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

Added EachBatch for iterating tables in batches

See merge request !12707

Don't mark empty MRs as merged on push to the target branch

Closes #32800

See merge request !12711

Allow admins to retrieve user agent details for an issue or snippet

Closes #29508

See merge request !12655