Fix order-dependent spec in Gitaly cleanup spec

Closes #38535

See merge request gitlab-org/gitlab!21370

Stubs for Gitaly calls are memoized by storage and service names in the
`@stubs` class variable. Normally this doesn't cause a problem, but an
example in `spec/lib/gitlab/gitaly_client/cleanup_service_spec.rb`
expected that a new stub would always be instantiated. Since
`spec/services/projects/cleanup_service_spec.rb` preceded
`spec/lib/gitlab/gitaly_client/cleanup_service_spec.rb`, the stub had
already been instantiated, causing the test to fail.

To fix this problem, we just clear out the Gitaly stubs for
`spec/lib/gitlab/gitaly_client/cleanup_service_spec.rb`.

Closes https://gitlab.com/gitlab-org/gitlab/issues/38535

Fix flaky spec in user_suggests_changes_on_diff_spec.rb

Closes #38277

See merge request gitlab-org/gitlab!21360

Resolve "Gitaly N+1 queries in /api/:version/groups/:id"

Closes #31031

See merge request gitlab-org/gitlab!20023

This change limits the number of projects displayed
in GET /groups/:id API, to prevent N+1 in Gitaly

Preload job_artifacts when loading builds in stage

Closes #38306

See merge request gitlab-org/gitlab!21307

The test appears to be failing occasionally because the diff notes
aren't always visible within the browser when the diff view is
reloaded. We fix this by clicking on the "Jump to first unresolved
thread" button to ensure the notes are shown.

Closes https://gitlab.com/gitlab-org/gitlab/issues/38277

Validate connection section in direct upload config

Closes #38258

See merge request gitlab-org/gitlab!21270

Add missing spec for fogbugz importer

See merge request gitlab-org/gitlab!20981

For some reason, `Settingslogic` doesn't always provide the right error
message when the `connection` block is omitted. Sometimes it erroneously
attributes the error section to a different part of the YAML
(e.g. `backup`, `dependency_proxy`).

This commit adds on more information on which `connection` block is
missing from the `gitlab.yml` (e.g. LFS, artifacts, or uploads).

Closes https://gitlab.com/gitlab-org/gitlab/issues/38258

Do not attribute unverified commit e-mails to GitLab users

Closes #28493

See merge request gitlab-org/gitlab!21214

Add two partial nonunique indexes

See merge request gitlab-org/gitlab!21230

- Non-unique

Update RSpec helper methods to *_next_instance_of

See merge request gitlab-org/gitlab!21244

Convert Web IDE specs to jest

See merge request gitlab-org/gitlab!21153

Fix Sidekiq testing API warnings in Rake tasks

Closes #38377

See merge request gitlab-org/gitlab!21343

Cleanup API GET service endpoint

See merge request gitlab-org/gitlab!21310

Add warning dialog when users click "Merge immediately" merge train option

Closes #12679

See merge request gitlab-org/gitlab!20054

Link to suggested community contributions

See merge request gitlab-org/gitlab!21345

Add security configuration navigation item

See merge request gitlab-org/gitlab!20711

This commit adds a new navigation item to the main navigation. It
sits within a project's "Security & Compliance" submenu and
links to the security configuration screen.

These files were updated automatically with this script:

```
result="$(awk '/[{\[]$/ { printf("%s\t", $0); next } 1' $1)"
echo "$result" > $1
yarn prettier --write $1
```

Includes related import reordering for IDE-related
files to fix eslint warnings.

See issue https://gitlab.com/gitlab-org/gitlab/issues/29243
which tracks the overall effort for migration to Jest.

Running any Rake task would show:

ARNING: Sidekiq testing API enabled, but this is not the test
environment.  Your jobs will not go to Redis.

To fix this, we move the `require` statement into the import task.
Now this message only shows when running the import job.

Closes https://gitlab.com/gitlab-org/gitlab/issues/38377

Increase experiment ratio

See merge request gitlab-org/gitlab!21303

Add the command for restarting GitLab helm chart

See merge request gitlab-org/gitlab!20214

Adds missing spec for fogbugz importer

Add new help text to sentry settings

Closes #34058

See merge request gitlab-org/gitlab!20663

Update eslint-plugin-import from 2.16.0 to 2.18.2 (/spec/javascripts/ide)

See merge request gitlab-org/gitlab!21304

Auto-correct some references in RSpec as:
- expect_any_instance_of -> expect_next_instance_of
- allow_any_instance_of -> allow_next_instance_of

Related to https://gitlab.com/gitlab-org/gitlab/issues/34997

Fix misleading comment

See merge request gitlab-org/gitlab!21255

Resolve "Document  - Make using GitLab auth with Vault easy" - documentation

Closes #9983

See merge request gitlab-org/gitlab!19980

Add changelog

Fix pipeline retry in a CI DAG

Closes #36068

See merge request gitlab-org/gitlab!21296

Refinements to the intro section

See merge request gitlab-org/gitlab!21217