Test against PG11 in MRs/master/nightly, and PG10 in master/nightly

The long-term testing strategy will be documented soon, see
https://gitlab.com/gitlab-org/gitlab/-/issues/213696.
Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab/ci/dev-fixtures.gitlab-ci.yml

@@ -3,9 +3,9 @@
     - .default-retry
     - .default-cache
     - .default-before_script
-    - .use-pg10
+    - .use-pg11
   stage: test
-  needs: ["setup-test-env pg10"]
+  needs: ["setup-test-env pg11"]
   variables:
     FIXTURE_PATH: "db/fixtures/development"
     SEED_CYCLE_ANALYTICS: "true"
@@ -26,7 +26,7 @@ run-dev-fixtures-ee:
   extends:
     - .run-dev-fixtures
     - .dev-fixtures:rules:ee-only
-    - .use-pg10-ee
+    - .use-pg11-ee
   script:
     - scripts/gitaly-test-spawn
     - cp ee/db/fixtures/development/* $FIXTURE_PATH

.gitlab/ci/docs.gitlab-ci.yml

@@ -66,9 +66,9 @@ graphql-reference-verify:
     - .default-cache
     - .default-before_script
     - .docs:rules:graphql-reference-verify
-    - .use-pg10
+    - .use-pg11
   stage: test
-  needs: ["setup-test-env pg10"]
+  needs: ["setup-test-env pg11"]
   script:
     - bundle exec rake gitlab:graphql:check_docs
     - bundle exec rake gitlab:graphql:check_schema

.gitlab/ci/frontend.gitlab-ci.yml

@@ -129,9 +129,9 @@ compile-assets pull-cache as-if-foss:
     - .default-retry
     - .default-cache
     - .default-before_script
-    - .use-pg10
+    - .use-pg11
   stage: fixtures
-  needs: ["setup-test-env pg10", "compile-assets pull-cache"]
+  needs: ["setup-test-env pg11", "compile-assets pull-cache"]
   script:
     - date
     - scripts/gitaly-test-spawn
@@ -289,7 +289,7 @@ webpack-dev-server:
     - .default-cache
     - .frontend:rules:default-frontend-jobs
   stage: test
-  needs: ["setup-test-env pg10", "compile-assets pull-cache"]
+  needs: ["setup-test-env pg11", "compile-assets pull-cache"]
   variables:
     WEBPACK_MEMORY_TEST: "true"
     WEBPACK_VENDOR_DLL: "true"

.gitlab/ci/global.gitlab-ci.yml

@@ -21,7 +21,7 @@
 # Jobs that only need to pull cache
 .default-cache:
   cache:
-    key: "debian-stretch-ruby-2.6.5-pg10-node-12.x"
+    key: "debian-stretch-ruby-2.6.5-pg11-node-12.x"
     paths:
       - .go/pkg/mod
       - vendor/ruby

.gitlab/ci/memory.gitlab-ci.yml

@@ -8,7 +8,7 @@
 memory-static:
   extends: .only-code-memory-job-base
   stage: test
-  needs: ["setup-test-env pg10"]
+  needs: ["setup-test-env pg11"]
   variables:
     SETUP_DB: "false"
   script:
@@ -36,9 +36,9 @@ memory-static:
 memory-on-boot:
   extends:
     - .only-code-memory-job-base
-    - .use-pg10
+    - .use-pg11
   stage: test
-  needs: ["setup-test-env pg10", "compile-assets pull-cache"]
+  needs: ["setup-test-env pg11", "compile-assets pull-cache"]
   variables:
     NODE_ENV: "production"
     RAILS_ENV: "production"

.gitlab/ci/rails.gitlab-ci.yml

 .rails:needs:setup-and-assets:
-  needs: ["setup-test-env pg10", "compile-assets pull-cache"]
+  needs: ["setup-test-env pg11", "compile-assets pull-cache"]
 
 .rails-job-base:
   extends:
@@ -25,17 +25,17 @@
   cache:
     policy: pull-push
 
-setup-test-env pg10:
+setup-test-env pg11:
   extends:
     - .base-setup-test-env
     - .rails:rules:default-refs-code-backstage-qa
-    - .use-pg10
+    - .use-pg11
 
-setup-test-env pg11:
+setup-test-env pg10:
   extends:
     - .base-setup-test-env
     - .rails:rules:master-refs-code-backstage
-    - .use-pg11
+    - .use-pg10
 
 setup-test-env pg9:
   extends:
@@ -55,7 +55,7 @@ static-analysis:
   script:
     - scripts/static-analysis
   cache:
-    key: "ruby-2.6.5-pg10-rubocop"
+    key: "ruby-2.6.5-pg11-rubocop"
     paths:
       - vendor/ruby
       - tmp/rubocop_cache
@@ -75,7 +75,7 @@ downtime_check:
 .rspec-base:
   extends: .rails-job-base
   stage: test
-  needs: ["setup-test-env pg10", "retrieve-tests-metadata", "compile-assets pull-cache"]
+  needs: ["setup-test-env pg11", "retrieve-tests-metadata", "compile-assets pull-cache"]
   script:
     - source scripts/rspec_helpers.sh
     - rspec_paralellized_job "--tag ~quarantine --tag ~geo --tag ~level:migration"
@@ -93,10 +93,10 @@ downtime_check:
     reports:
       junit: junit_rspec.xml
 
-.rspec-base-quarantine-pg10:
+.rspec-base-quarantine-pg11:
   extends:
     - .rspec-base
-    - .use-pg10
+    - .use-pg11
   variables:
     RSPEC_OPTS: "--tag quarantine -- spec/"
   script:
@@ -104,37 +104,37 @@ downtime_check:
     - rspec_simple_job "${RSPEC_OPTS}"
   allow_failure: true
 
-.rspec-base-pg10:
+.rspec-base-pg11:
   extends:
     - .rspec-base
     - .rails:rules:ee-and-foss
-    - .use-pg10
+    - .use-pg11
 
 .rspec-base-migration:
   script:
     - source scripts/rspec_helpers.sh
     - rspec_paralellized_job "--tag ~quarantine --tag ~geo --tag level:migration"
 
-rspec migration pg10:
+rspec migration pg11:
   extends:
-    - .rspec-base-pg10
+    - .rspec-base-pg11
     - .rspec-base-migration
   parallel: 5
 
-rspec unit pg10:
-  extends: .rspec-base-pg10
+rspec unit pg11:
+  extends: .rspec-base-pg11
   parallel: 20
 
-rspec integration pg10:
-  extends: .rspec-base-pg10
+rspec integration pg11:
+  extends: .rspec-base-pg11
   parallel: 8
 
-rspec system pg10:
-  extends: .rspec-base-pg10
+rspec system pg11:
+  extends: .rspec-base-pg11
   parallel: 24
 
 rspec fast_spec_helper:
-  extends: .rspec-base-pg10
+  extends: .rspec-base-pg11
   script:
     - bin/rspec spec/fast_spec_helper.rb
 
@@ -142,9 +142,9 @@ rspec fast_spec_helper:
   extends:
     - .rails-job-base
     - .rails:rules:ee-and-foss
-    - .use-pg10
+    - .use-pg11
   stage: test
-  needs: ["setup-test-env pg10"]
+  needs: ["setup-test-env pg11"]
 
 db:migrate:reset:
   extends: .db-job-base
@@ -213,18 +213,18 @@ rspec:coverage:
   # We cannot use needs since it would mean needing 84 jobs (since most are parallelized)
   # so we use `dependencies` here.
   dependencies:
-    - setup-test-env pg10
-    - rspec migration pg10
-    - rspec unit pg10
-    - rspec integration pg10
-    - rspec system pg10
-    - rspec-ee migration pg10
-    - rspec-ee unit pg10
-    - rspec-ee integration pg10
-    - rspec-ee system pg10
-    - rspec-ee unit pg10 geo
-    - rspec-ee integration pg10 geo
-    - rspec-ee system pg10 geo
+    - setup-test-env pg11
+    - rspec migration pg11
+    - rspec unit pg11
+    - rspec integration pg11
+    - rspec system pg11
+    - rspec-ee migration pg11
+    - rspec-ee unit pg11
+    - rspec-ee integration pg11
+    - rspec-ee system pg11
+    - rspec-ee unit pg11 geo
+    - rspec-ee integration pg11 geo
+    - rspec-ee system pg11 geo
     - memory-static
     - memory-on-boot
   variables:
@@ -247,34 +247,34 @@ rspec:coverage:
 
 ####################
 # master-only jobs #
-rspec quarantine pg10:
+rspec quarantine pg11:
   extends:
-    - .rspec-base-quarantine-pg10
+    - .rspec-base-quarantine-pg11
     - .rails:rules:master-refs-code-backstage
 
-.rspec-base-pg11:
+.rspec-base-pg10:
   extends:
     - .rspec-base
     - .rails:rules:master-refs-code-backstage
-    - .use-pg11
-  needs: ["setup-test-env pg11", "retrieve-tests-metadata", "compile-assets pull-cache"]
+    - .use-pg10
+  needs: ["setup-test-env pg10", "retrieve-tests-metadata", "compile-assets pull-cache"]
 
-rspec migration pg11:
+rspec migration pg10:
   extends:
-    - .rspec-base-pg11
+    - .rspec-base-pg10
     - .rspec-base-migration
   parallel: 5
 
-rspec unit pg11:
-  extends: .rspec-base-pg11
+rspec unit pg10:
+  extends: .rspec-base-pg10
   parallel: 20
 
-rspec integration pg11:
-  extends: .rspec-base-pg11
+rspec integration pg10:
+  extends: .rspec-base-pg10
   parallel: 8
 
-rspec system pg11:
-  extends: .rspec-base-pg11
+rspec system pg10:
+  extends: .rspec-base-pg10
   parallel: 24
 # master-only jobs #
 ####################
@@ -310,41 +310,41 @@ rspec system pg9:
 
 #######################
 # EE master-only jobs #
-rspec-ee quarantine pg10:
+rspec-ee quarantine pg11:
   extends:
-    - .rspec-base-quarantine-pg10
+    - .rspec-base-quarantine-pg11
     - .rails:rules:master-refs-code-backstage-ee-only
   variables:
     RSPEC_OPTS: "--tag quarantine -- ee/spec/"
 
-.rspec-ee-base-pg11:
+.rspec-ee-base-pg10:
   extends:
     - .rspec-base-ee
-    - .use-pg11-ee
-  needs: ["setup-test-env pg11", "retrieve-tests-metadata", "compile-assets pull-cache"]
+    - .use-pg10-ee
+  needs: ["setup-test-env pg10", "retrieve-tests-metadata", "compile-assets pull-cache"]
 
-rspec-ee migration pg11:
+rspec-ee migration pg10:
   extends:
-    - .rspec-ee-base-pg11
+    - .rspec-ee-base-pg10
     - .rspec-base-migration
     - .rails:rules:master-refs-code-backstage
   parallel: 2
 
-rspec-ee unit pg11:
+rspec-ee unit pg10:
   extends:
-    - .rspec-ee-base-pg11
+    - .rspec-ee-base-pg10
     - .rails:rules:master-refs-code-backstage
   parallel: 10
 
-rspec-ee integration pg11:
+rspec-ee integration pg10:
   extends:
-    - .rspec-ee-base-pg11
+    - .rspec-ee-base-pg10
     - .rails:rules:master-refs-code-backstage
   parallel: 4
 
-rspec-ee system pg11:
+rspec-ee system pg10:
   extends:
-    - .rspec-ee-base-pg11
+    - .rspec-ee-base-pg10
     - .rails:rules:master-refs-code-backstage
   parallel: 6
 # EE master-only jobs #
@@ -357,52 +357,52 @@ rspec-ee system pg11:
     - .rspec-base
     - .rails:rules:ee-only
 
-.rspec-base-pg10-as-if-foss:
+.rspec-base-pg11-as-if-foss:
   extends:
     - .rspec-base-ee
     - .as-if-foss
-    - .use-pg10
-  needs: ["setup-test-env pg10", "retrieve-tests-metadata", "compile-assets pull-cache as-if-foss"]
+    - .use-pg11
+  needs: ["setup-test-env pg11", "retrieve-tests-metadata", "compile-assets pull-cache as-if-foss"]
 
-.rspec-ee-base-pg10:
+.rspec-ee-base-pg11:
   extends:
     - .rspec-base-ee
-    - .use-pg10-ee
+    - .use-pg11-ee
 
-rspec migration pg10-as-if-foss:
+rspec migration pg11-as-if-foss:
   extends:
-    - .rspec-base-pg10-as-if-foss
+    - .rspec-base-pg11-as-if-foss
     - .rspec-base-migration
   parallel: 5
 
-rspec unit pg10-as-if-foss:
-  extends: .rspec-base-pg10-as-if-foss
+rspec unit pg11-as-if-foss:
+  extends: .rspec-base-pg11-as-if-foss
   parallel: 20
 
-rspec integration pg10-as-if-foss:
-  extends: .rspec-base-pg10-as-if-foss
+rspec integration pg11-as-if-foss:
+  extends: .rspec-base-pg11-as-if-foss
   parallel: 8
 
-rspec system pg10-as-if-foss:
-  extends: .rspec-base-pg10-as-if-foss
+rspec system pg11-as-if-foss:
+  extends: .rspec-base-pg11-as-if-foss
   parallel: 24
 
-rspec-ee migration pg10:
+rspec-ee migration pg11:
   extends:
-    - .rspec-ee-base-pg10
+    - .rspec-ee-base-pg11
     - .rspec-base-migration
   parallel: 2
 
-rspec-ee unit pg10:
-  extends: .rspec-ee-base-pg10
+rspec-ee unit pg11:
+  extends: .rspec-ee-base-pg11
   parallel: 10
 
-rspec-ee integration pg10:
-  extends: .rspec-ee-base-pg10
+rspec-ee integration pg11:
+  extends: .rspec-ee-base-pg11
   parallel: 4
 
-rspec-ee system pg10:
-  extends: .rspec-ee-base-pg10
+rspec-ee system pg11:
+  extends: .rspec-ee-base-pg11
   parallel: 6
 
 .rspec-ee-base-geo:
@@ -412,20 +412,20 @@ rspec-ee system pg10:
     - scripts/prepare_postgres_fdw.sh
     - rspec_paralellized_job "--tag ~quarantine --tag geo"
 
-.rspec-ee-base-geo-pg10:
+.rspec-ee-base-geo-pg11:
   extends:
     - .rspec-ee-base-geo
-    - .use-pg10-ee
+    - .use-pg11-ee
 
-rspec-ee unit pg10 geo:
-  extends: .rspec-ee-base-geo-pg10
+rspec-ee unit pg11 geo:
+  extends: .rspec-ee-base-geo-pg11
   parallel: 2
 
-rspec-ee integration pg10 geo:
-  extends: .rspec-ee-base-geo-pg10
+rspec-ee integration pg11 geo:
+  extends: .rspec-ee-base-geo-pg11
 
-rspec-ee system pg10 geo:
-  extends: .rspec-ee-base-geo-pg10
+rspec-ee system pg11 geo:
+  extends: .rspec-ee-base-geo-pg11
 
 db:rollback geo:
   extends: