Update auto-build-image to v1.5.0

This was a feature-flagged change, see rollout issue
https://gitlab.com/gitlab-org/gitlab/-/issues/337990

We delete the feature flag here to prevent confusion in production if
the latest template falls behind stable.

The latest template must, however, remain, as removing it is a breaking
change.

Changelog: changed

config/feature_flags/development/redirect_to_latest_template_jobs_build.yml

----
-name: redirect_to_latest_template_jobs_build
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/67782
-rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/337990
-milestone: '14.2'
-type: development
-group: group::configure
-default_enabled: false

lib/gitlab/ci/templates/Jobs/Build.gitlab-ci.yml

 variables:
-  AUTO_BUILD_IMAGE_VERSION: 'v1.0.0'
+  AUTO_BUILD_IMAGE_VERSION: 'v1.5.0'
 
 build:
   stage: build
@@ -19,6 +19,9 @@ build:
         export CI_APPLICATION_TAG=${CI_APPLICATION_TAG:-$CI_COMMIT_TAG}
       fi
     - /build/build.sh
+  artifacts:
+    reports:
+      dotenv: gl-auto-build-variables.env
   rules:
     - if: '$BUILD_DISABLED'
       when: never

lib/gitlab/ci/templates/Jobs/Build.latest.gitlab-ci.yml

-# WARNING: This latest template is for internal FEATURE-FLAG TESTING ONLY.
-#          It is not meant to be used with `include:`.
-#          This template is scheduled for removal when testing is complete: https://gitlab.com/gitlab-org/gitlab/-/issues/337987
-
 variables:
   AUTO_BUILD_IMAGE_VERSION: 'v1.5.0'
 

lib/gitlab/template/gitlab_ci_yml_template.rb

@@ -5,9 +5,7 @@ module Gitlab
     class GitlabCiYmlTemplate < BaseTemplate
       BASE_EXCLUDED_PATTERNS = [%r{\.latest\.}].freeze
 
-      TEMPLATES_WITH_LATEST_VERSION = {
-        'Jobs/Build' => true
-      }.freeze
+      TEMPLATES_WITH_LATEST_VERSION = {}.freeze
 
       def description
         "# This file is a template, and might need editing before it works on your project."