Edit Admin Area's index for SSOT

See merge request gitlab-org/gitlab-ce!29327

Edit "Visibility and access controls" to meet SSOT guidelines

See merge request gitlab-org/gitlab-ce!29171

Edit "Subgroups" for SSOT

See merge request gitlab-org/gitlab-ce!29318

Single source of truth for merge requests docs

Closes #61516

See merge request gitlab-org/gitlab-ce!29269

- Edit pages under user/project/merge_requests and
  add the relevant types in the frontmatter.
- Clean up descriptions.

Based on https://gitlab.com/groups/gitlab-org/-/epics/1280

Revert "Merge branch '50070-legacy-attachments' into 'master'"

See merge request gitlab-org/gitlab-ce!29391

This reverts commit fd19f887, reversing
changes made to abb2d4c6.

Bump sentry-raven to 2.9

See merge request gitlab-org/gitlab-ce!29352

Remove example.net, replace with example.com

See merge request gitlab-org/gitlab-ce!25535

# Conflicts:
#   doc/user/project/clusters/serverless/index.md

Align system note within discussion with other notes

Closes #55033

See merge request gitlab-org/gitlab-ce!29367

Externalize profiles preferences

Closes #53349

See merge request gitlab-org/gitlab-ce!28470

Resolve "Merge request discussion text jumps when resolved"

Closes #61565

See merge request gitlab-org/gitlab-ce!28995

changed dropdown styles in board page

See merge request gitlab-org/gitlab-ce!29338

Remove list sorting from NewListDropdown

See merge request gitlab-org/gitlab-ce!29077

Show description of 'gettext:regenerate' task

See merge request gitlab-org/gitlab-ce!29362

Add a note about nested scopes matching

See merge request gitlab-org/gitlab-ce!28466

Backport of EE Displaying Blocking MRs

See merge request gitlab-org/gitlab-ce!29095

Move issue board models to boards directory

Closes #61293

See merge request gitlab-org/gitlab-ce!29260

Some classes in vue_shared were used only by boards, so they were
moved to the boards directory.

Allow masking if 8 or more characters in base64

See merge request gitlab-org/gitlab-ce!29143

Fix migration specs using factories

Closes #62911

See merge request gitlab-org/gitlab-ce!29350

We need to stub default_git_depth and default_git_depth= because some
old migrations specs try to create a record using schema before that
column was introduced.

The `let!` calls were executed before the `before` hook which still
caused some factories to fail, so they're created in the `before` hook
now as well.

Add task count and completed count to responses of Issue and MR

See merge request gitlab-org/gitlab-ce!28859

Improve email text part

See merge request gitlab-org/gitlab-ce!29111

Remove extraneous DiffNote#supports_suggestion? calls

See merge request gitlab-org/gitlab-ce!29027

Add project level git depth setting

Closes #59688

See merge request gitlab-org/gitlab-ce!28919

Migrate legacy uploads

Closes #57217

See merge request gitlab-org/gitlab-ce!24679