Temporarily disable db:migrate-from-v12.10 job

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/325838#note_537126367

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

@@ -359,32 +359,34 @@ db:check-migrations:
     - scripts/validate_migration_schema
   allow_failure: true
 
-db:migrate-from-v12.10.0:
-  extends: .db-job-base
-  variables:
-    SETUP_DB: "false"
-  script:
-    - export PROJECT_TO_CHECKOUT="gitlab"
-    - export TAG_TO_CHECKOUT="v12.10.0-ee"
-    - '[[ -d "ee/" ]] || export PROJECT_TO_CHECKOUT="gitlab-foss"'
-    - '[[ -d "ee/" ]] || export TAG_TO_CHECKOUT="v12.10.0"'
-    - retry 'git fetch https://gitlab.com/gitlab-org/$PROJECT_TO_CHECKOUT.git $TAG_TO_CHECKOUT'
-    - git checkout -f FETCH_HEAD
-    - sed -i -e "s/gem 'grpc', '~> 1.24.0'/gem 'grpc', '~> 1.30.2'/" Gemfile  # Update gRPC for Ruby 2.7
-    - sed -i -e "s/gem 'google-protobuf', '~> 3.8.0'/gem 'google-protobuf', '~> 3.12.0'/" Gemfile
-    - gem install bundler:1.17.3
-    - bundle update google-protobuf grpc bootsnap
-    - bundle install $BUNDLE_INSTALL_FLAGS
-    - date
-    - cp config/gitlab.yml.example config/gitlab.yml
-    - bundle exec rake db:drop db:create db:structure:load db:seed_fu
-    - date
-    - git checkout -f $CI_COMMIT_SHA
-    - bundle install $BUNDLE_INSTALL_FLAGS
-    - date
-    - . scripts/prepare_build.sh
-    - date
-    - bundle exec rake db:migrate
+# Temporarily disabled due to failures in https://gitlab.com/gitlab-org/gitlab/-/issues/325838
+
+# db:migrate-from-v12.10.0:
+#   extends: .db-job-base
+#   variables:
+#     SETUP_DB: "false"
+#   script:
+#     - export PROJECT_TO_CHECKOUT="gitlab"
+#     - export TAG_TO_CHECKOUT="v12.10.0-ee"
+#     - '[[ -d "ee/" ]] || export PROJECT_TO_CHECKOUT="gitlab-foss"'
+#     - '[[ -d "ee/" ]] || export TAG_TO_CHECKOUT="v12.10.0"'
+#     - retry 'git fetch https://gitlab.com/gitlab-org/$PROJECT_TO_CHECKOUT.git $TAG_TO_CHECKOUT'
+#     - git checkout -f FETCH_HEAD
+#     - sed -i -e "s/gem 'grpc', '~> 1.24.0'/gem 'grpc', '~> 1.30.2'/" Gemfile  # Update gRPC for Ruby 2.7
+#     - sed -i -e "s/gem 'google-protobuf', '~> 3.8.0'/gem 'google-protobuf', '~> 3.12.0'/" Gemfile
+#     - gem install bundler:1.17.3
+#     - bundle update google-protobuf grpc bootsnap
+#     - bundle install $BUNDLE_INSTALL_FLAGS
+#     - date
+#     - cp config/gitlab.yml.example config/gitlab.yml
+#     - bundle exec rake db:drop db:create db:structure:load db:seed_fu
+#     - date
+#     - git checkout -f $CI_COMMIT_SHA
+#     - bundle install $BUNDLE_INSTALL_FLAGS
+#     - date
+#     - . scripts/prepare_build.sh
+#     - date
+#     - bundle exec rake db:migrate
 
 db:rollback:
   extends: .db-job-base