Improves restriction of multiple Kubernetes clusters via API

Closes #56110

See merge request gitlab-org/gitlab-ce!24251

EE Port: Improves restriction of multiple Kubernetes clusters via API

Closes gitlab-ce#56110

See merge request gitlab-org/gitlab-ee!9088

Remove `releases_page` feature flag

Closes #56072

See merge request gitlab-org/gitlab-ce!24215

Resolve "Rename project tags to project topics"

Closes #54167

See merge request gitlab-org/gitlab-ce!24219

Add troubleshooting steps to Jenkins documentation

See merge request gitlab-org/gitlab-ee!9082

Add documentation for Release Asset Link API

Closes #56060

See merge request gitlab-org/gitlab-ce!24211

Ensure approver references are all present

See merge request gitlab-org/gitlab-ee!9118

We introduced releases_page feature flag.
Given this feature is deemed stable, we should remove
this flag before 19th.

Initial Serverless Functions detailed view

See merge request gitlab-org/gitlab-ce!23863

Modifies authorize! method to accept a third param, and then use it in
combination with 'add_cluster' policy to appropriately restrict adding
multiple clusters

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56110

Tangential tweaks around Geo hashed storage warnings

See merge request gitlab-org/gitlab-ee!8999

- Rename CSS class
- Fix broken test
- Update project settings docs
- Update general project settings image
- Rename helper methods

Preserve URL fragment across sign-in and sign-up redirects

Closes #32584

See merge request gitlab-org/gitlab-ce!19165

Remove unused button classes `btn-create` and `comment-btn`

See merge request gitlab-org/gitlab-ee!8670

Remove unused button classes `btn-create` and `comment-btn`

See merge request gitlab-org/gitlab-ce!23232

[QA] Retrieve the current user name and email

Closes gitlab-org/quality/staging#25

See merge request gitlab-org/gitlab-ce!24298

The refactor preceded some code reuse in an earlier iteration of
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8433
but is now just a small standalone improvement.

When assigning with _ids, if an id is no longer present,
Rails would raise error.

Speed up Open list when there are assignee lists

Closes gitlab-ce#51184

See merge request gitlab-org/gitlab-ee!9090

Fail and ask people to run `ee-specific-lines-check` locally

Closes #6511

See merge request gitlab-org/gitlab-ee!9098

Use revision instead of build number for TeamCity query.

See merge request gitlab-org/gitlab-ce!23898

Remove backfill migration for legacy projects

See merge request gitlab-org/gitlab-ce!24299

Add missing locale lines

Closes #9138

See merge request gitlab-org/gitlab-ee!9117

We've found some problems with the backgroung migration:
BackfillLegacyProjectRepositories

See https://gitlab.com/gitlab-org/gitlab-ce/issues/56061

The migration was disabled to run on production:
https://gitlab.com/gitlab-com/gl-infra/infrastructure/issues/5906

So to overcome it's not being run anywhere, just remove it.

Whenever all problems in BackfillLegacyProjectRepositories are fixed
we'll create a new migration (with a different timestamp) to have it
run.