Add build stage_id reference background migration

Closes #34151

See merge request !12513

Remove many N+1 queries with merge requests API

See merge request !12726

Send Gitaly Repository with /api/internal/allowed

See merge request !12452

Identified via `ENABLE_BULLET=1 bundle exec rspec spec/requests/api/merge_requests_spec.rb:34`

Improves speed of #34159

fix migrations in the future

Closes #34832

See merge request !12719

Username and password are no longer stripped from import url on import

See merge request !12725

fix milestones finder failing spec

Closes #34852

See merge request !12727

Remove double border on last group row

Closes #34612

See merge request !12666

CE port of updated welcome page

See merge request !12662

Improve members view on mobile

Closes #25103

See merge request !12619

Add creation time filters to user search API for admins

Closes #29507

See merge request !12682

Resolve "Navigation - Color palette for new navigation"

Closes #34402

See merge request !12684

Mention that 9.3 also needs `log_bin_trust_function_creators` on MySQL.

See merge request !12687

- Make single gitaly payload
- Add feature-flag specs to verify payload

Resolve "Report abusive content from an issue or merge request"

Closes #30281

See merge request !11786

Mark a subgroup-related spec as PostgreSQL-only

Closes #34847

See merge request !12722

Fixed GFM references not being included when update issue inline

Closes gitlab-ee#2878

See merge request !12720

Resolve "Liberation Mono weird font rendering on Fedora/openSUSE/other Linux distros"

Closes #31982

See merge request !12718

Fix typo in SHA attribute spec

See merge request !12717

#20628 Enable implicit flow in Gitlab as OAuth Provider

Closes #20628, #2716, and #19470

See merge request !12384

Include new URL helpers retroactively into includers of Gitlab::Routing

Closes #34821

See merge request !12716

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/34847

Add gitaly_git_blob_raw feature

See merge request !12712

Allow to enable the performance bar per user or Feature group

Closes #33929 and #34528

See merge request !12362

Fixed jobs page not being in new admin sidebar

See merge request !12710

# Conflicts:
#   app/models/concerns/each_batch.rb
#   spec/models/concerns/each_batch_spec.rb