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.

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

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

Documentation: Added Semaphore Test Boosters example to CI YAML `parallel` docs

Closes #63509

See merge request gitlab-org/gitlab-ce!31067

Update docker title for docker-in-docker workflow

See merge request gitlab-org/gitlab-ce!31273

Update dependency @gitlab/ui to ^5.11.1

See merge request gitlab-org/gitlab-ce!31176

Emit dropdown show event in boards_selector test

See merge request gitlab-org/gitlab-ce!31255

Add methods for injecting EE modules

See merge request gitlab-org/gitlab-ce!31055

[ci skip]

[CE] Resolve "Exporting issues size is 15MB but max is 20MB"

See merge request gitlab-org/gitlab-ce!31234

Remove pdf.js deprecation warnings

See merge request gitlab-org/gitlab-ce!31253

Add partial index on identities table to speed up LDAP lookups

Closes #59630

See merge request gitlab-org/gitlab-ce!26710

feat: add support page link in help menu

See merge request gitlab-org/gitlab-ce!30459

Creates a new item in help dropdown to show configured support page link

Improves graphql_helpers

See merge request gitlab-org/gitlab-ce!31251

QA spec for Auto DevOps should use 10GB GKE disk

See merge request gitlab-org/gitlab-ce!31266

For customers with thousands of entries in the table, lookups for an
LDAP identity dominated the PostgreSQL statistics because of sequential
scans. We can speed this up by adding a partial index with the
extern_uid and provider.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/59630

Fix exception handling in Gitaly autodetection

Closes #65328

See merge request gitlab-org/gitlab-ce!31285

This improves the graphql test helpers, failing earlier and more
explicitly.

In SELinux, the file cannot be written, and `Errno::EACCES`, not
`Errno::ACCESS` is thrown.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/65328

1. `page.getViewpoint()` now takes in JSON instead of an integer.
2. Promises are returned from loading and rendering tasks.

See https://mozilla.github.io/pdf.js/examples/index.html for more
details.