Metrics graph error fix

Closes #30840

See merge request !10839

Show correct size when MR diff overflows

Closes #26560

See merge request !10827

Resolve "Clean up padding with Markdown headers"

Closes #27827

See merge request !10350

Upgrade Sidekiq to 4.2.10

See merge request !10899

Add sub-nav for Project Integration Services edit page

Closes #31174

See merge request !10813

Fix OAuth, LDAP and SAML SSO when regular sign-ups are disabled

Closes #31294

See merge request !10896

The problem is that we often go via a diff object constructed from the diffs
stored in the DB. Those diffs, by definition, don't overflow, so we don't have
access to the 'correct' `real_size` - that is stored on the MR diff object
iself.

Add index to webhooks type column

Closes #31232

See merge request !10883

Ignore all builds* directories from version control

See merge request !10903

Fix diffs with edit-forking needs

Closes #31276

See merge request !10868

Fix usage ping docs link from empty cohorts page

See merge request !10907

Update markdown.md

See merge request !10776

Show group name on flash container when group is created from Admin area

Closes #21683

See merge request !10905

Don't display the `is_admin?` flag for user API responses

Closes #29903

See merge request !10846

Fix typo in discussions doc.

See merge request !10889

The restore process copies the old builds/ dir into builds.<epoch>/
which results in Git complaining about untracked files

- To prevent an attacker from enumerating the `/users` API to get a list of all
  the admins.

- Display the `is_admin?` flag wherever we display the `private_token` - at the
  moment, there are two instances:

  - When an admin uses `sudo` to view the `/user` endpoint
  - When logging in using the `/session` endpoint

Add Health Check Documentation

Closes #30649

See merge request !10565

Gitaly testing toml

Closes gitaly#182

See merge request !10605

See https://github.com/mperham/sidekiq/blob/master/Changes.md#4210