Reference: 3c7c859c359bf5d3955dd300d6861ff33af21ca7

(security-9-2) Upload files into `public/upload/system` instead of `public/upload`

See merge request !2104

Conflicts:
  app/validators/dynamic_path_validator.rb

Fixed conflicts based on 3c7c859c359bf5d3955dd300d6861ff33af21ca7

Restrict API X-Frame-Options to same origin

See merge request !2103

Allow users autocomplete by author_id only for authenticated users

See merge request !2100

Escapes html content before appending it to the DOM

See merge request !2107

This reverts commit 821daf70, reversing
changes made to cbde95c2.

Fix issue realtime title/description change CSS transition

See merge request !11731

This was causing a weird bug in Safari where the CSS class wasn't applied yet the nextTick timeout was called meaning the CSS transition didn't happen

Closes #32932

[ci skip]

show loading indicator while waiting for assignees first fetch

Closes #32170

See merge request !11434

Fix ambiguous routing issues by teaching router about reserved words

See merge request !11570

32715 Make all notes use equal padding

Closes #32715 and #32467

See merge request !11616

Use refresh icon for retried jobs

Closes #32828

See merge request !11667

Read HEAD commit and use as sentry releases value

Closes #32535

See merge request !11565

Prevent errors from non-functional notify_post_receive endpoint

See merge request !11509

Fix pipeline etag

Closes #32658

See merge request !11615

Fix right-sidebar gap on mobile

Closes #32735

See merge request !11625

Change order of if blocks to determine widget state properly.

Closes #32550

See merge request !11668

[ci skip]

Load improvements related to MR widget

See merge request !11518

Remove CI/CD models directory from `eager_load_paths`

Closes #31841

See merge request !11129

Add missing regex to backup manager

Closes #32669

See merge request !11635

Resolve "Follow-up from "Add "SHA mismatch" state to the MR widget""

Closes #32480

See merge request !11466

Fix admin tabs

Closes #32496

See merge request !11514

Fix migrations for older PostgreSQL versions

Closes #32721

See merge request !11620

New doc topic: issues

Closes #27650

See merge request !11075

Auto update docs

See merge request !11552

Add note about artifacts previewing in docs

See merge request !11539

Add docs for change of Cache/Artifact restore order"

Closes #32604

See merge request !11545

Fix spacing of issue emojis

Closes #32631

See merge request !11567

Move environment monitoring to environments doc

See merge request !11583

Change pipelines schedules help page path

See merge request !11592

32486 Fix placement of note emoji on hover

Closes #32486

See merge request !11605

Fix jQuery data attribute caching issue causing expanding issues

Closes #32705

See merge request !11609

Add to docs: issues multiple assignees

Closes gitlab-ee#2440 and #32574

See merge request !11556

Adds "comments on snippets"  to doc

Closes #32575

See merge request !11563

MR widget styling fixes

Closes #32657

See merge request !11591