Instead of only checking once within a timeout, check multiple times
within a timeout.

That means with a timeout of 30 seconds and 3 retries. Each try would
be allowed 20 seconds.

The circuitbreaker now has 2 failure modes:

- Backing off: This will raise the `Gitlab::Git::Storage::Failing`
  exception. Access to the shard is blocked temporarily.
- Circuit broken: This will raise the
  `Gitlab::Git::Storage::CircuitBroken` exception. Access to the shard
  will be blocked until the failures are reset.

Remove Diff class from global namespace

See merge request gitlab-org/gitlab-ce!14965

Fix the broken .tests-metadata-state definition

Closes #39308

See merge request gitlab-org/gitlab-ce!14969

Fix deletion of container registry or images returning an error

Closes #39354

See merge request gitlab-org/gitlab-ce!14992

The fog-aliyun gem had a bug in v0.1.0 for file storage creation/update. This…

Closes #39126

See merge request gitlab-org/gitlab-ce!14991

A successful DELETE call would result in a 204 No Content result,
which would have an empty response body. Don't automatically try
to parse this value as JSON both because there is no additional
information passed in the response body.

Closes #39354

The fog-aliyun gem had a bug in v0.1.0 for file storage creation/update. This merge requests update the gem to v0.2.0 which contains the fix:

https://github.com/fog/fog-aliyun/commit/a7456ca6b63e5a0d88c849914679d2fa4707c10c

Closes #39126

Decrease ABC threshold to 54.28

See merge request gitlab-org/gitlab-ce!14920

Make sure we render events for projects within a group

Closes #39305

See merge request gitlab-org/gitlab-ce!14974

[ci skip]

Resolve "Remove help text regarding group issues on group issues page (and group merge requests page)"

Tip from
https://robots.thoughtbot.com/write-reliable-asynchronous-integration-tests-with-capybara#directly-interacting-with-javascript

New Crowdin translations

See merge request gitlab-org/gitlab-ee!3030

[ci skip]

Because container registry tags can have periods, the addition of the `.json`
format caused ambiguity. Since the tag name regex is greedy, it would attempt
to locate an image named `foo.json` instead of `foo`.

Closes #39260

[ci skip]

They're costly. This will also avoid some edge cases where
charlock_holmes assigns a weird encoding to a perfectly valid UTF-8
string.