Refactor the epics/issues API specs to remove code duplication.

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

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.

Correctly show rebase state in MR widget

Closes #45942

See merge request gitlab-org/gitlab-ce!24300

Merge branch '54484-anchor-links-to-comments-or-system-notes-can-break-with-discussion-filters' into 'master'

Discussion filters - ensured note links resolves to the right note

Closes #54484

See merge request gitlab-org/gitlab-ce!24228

Signed-off-by: Rémy Coutable <remy@rymai.me>

Add documentation for Error Tracking

Closes #55581

See merge request gitlab-org/gitlab-ce!24275

EE Backport - Add documentation for Error Tracking

See merge request gitlab-org/gitlab-ee!9096

Setting Unicorn Worker memory limit in gitlab.rb

See merge request gitlab-org/gitlab-ce!14466

Add actionable empty states for Issues and Merge requests

Closes #25043

See merge request gitlab-org/gitlab-ce!24077

Correctly shows the rebase state even if a merge requests pipeline
has failed.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/45942

[Review Apps] Use 2 replicas for the `tiller-deploy` Deployment

Closes #55323

See merge request gitlab-org/gitlab-ce!23806

Fix files/blob api endpoint content disposition

Closes #55882

See merge request gitlab-org/gitlab-ce!24267

Update tracing settings to match error tracking

See merge request gitlab-org/gitlab-ee!8786