Docs: update time tracking doc

See merge request gitlab-org/gitlab-ce!30890

- CORE ONLY badge
- Link 'introduced in' note
- Inline linking

Use file-loader for sprite icons within icon.vue

See merge request gitlab-org/gitlab-ce!31257

Help user to know what to do when deploying to cluster

Closes #58947

See merge request gitlab-org/gitlab-ce!31318

Move version info for Geo

See merge request gitlab-org/gitlab-ce!31269

Fix whitespace in dev docs

See merge request gitlab-org/gitlab-ce!30599

Many code blocks are 4spaced, and they render in GitLab
without coloring as a result, even though they are
fenced with a language label. If in a list, other items
will render as being in a code block too, even if not
meant to. This fixes all these issues for most docs in
/development, and cleans up other whitespace issues too

Update gitlab-styles to close #54853

Closes #54853

See merge request gitlab-org/gitlab-ce!31155

Change validations to allow blank but not allow nil

See merge request gitlab-org/gitlab-ce!31133

- The most common use case for qualified_domain_validator currently is
to allow blank ([]) but not allow nil. Modify the
qualified_domain_validator to support this use case.

Fix Deprecation Warning in has_environment_scope

See merge request gitlab-org/gitlab-ee!14806

Remove quarantine_push_size_check feature flag

See merge request gitlab-org/gitlab-ee!14904

Ensure default metrics embed is cached

See merge request gitlab-org/gitlab-ce!31157

Remove unused cluster configuration logic

See merge request gitlab-org/gitlab-ce!25725

Added E2E test for Secure group security dashboard

Closes #9192

See merge request gitlab-org/gitlab-ee!14874

Added an end to end test verifying the Secure group security dashboard.

Also added necessary selectors and page objects to support this test.

Renamed the project reports test file to security_reports_spec.

Edits to user Profile and Settings content

See merge request gitlab-org/gitlab-ce!31128

Each of these files were edited to ensure compliance
with the docs standard layout, as part of the SSOT epic.

In addition, some copy editing was done, to improve clarity,
and comply with the GitLab docs style guide.

Add support for controlling amount of nodes

See merge request gitlab-org/gitlab-ce!31299

Nodes spun up in Gcloud defaults to '3' nodes
This number can be a lot considering the QA
autodevops spec does not need this many nodes

All cluster resources are now created on demand when
a deployment job starts.

Remove duplicated words on custom hooks docs

See merge request gitlab-org/gitlab-ce!31309

Docs: Add SCIM troubleshooting for Azure mapping error

Closes gitlab-ee#13016

See merge request gitlab-org/gitlab-ce!31208

Document multi-project variable precedence

Closes gitlab-ee#12879

See merge request gitlab-org/gitlab-ce!31291

Document how to use the GroupSync rake task

See merge request gitlab-org/gitlab-ce!31192