Migrate Git tricks doc from /debug to docs and make some edits

See merge request gitlab-org/gitlab-ce!27922

Change code references to codeblocks so they can be copied
more easily, and add link to doc from git topic index. Also
applies suggested changes.

Upgrade PostgreSQL versions in CI

See merge request gitlab-org/gitlab-ce!31446

Expand markdown linting rules for docs

See merge request gitlab-org/gitlab-ce!31359

MD002 - First header should be level 1
MD006 - Start bullets at beginning of line
MD019 - No multiple spaces after header style
MD022 - Headers surrounded by blank lines
MD025 - Only 1 level 1 header
MD028 - No blank lines within blockquote
MD038 - Spaces inside code span elements

Docs: how to migrate repo into Git LFS

Closes #58911

See merge request gitlab-org/gitlab-ce!30615

- Link new doc to and from other docs
- Add tbs section

* 9.6.11 -> 9.6.14
* 10.7 -> 10.9

This is done in preparation for upgrading PostgreSQL in Omnibus:
https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/3492

Clarify that we now use group based teams

See merge request gitlab-org/gitlab-ce!31381

Fix misspelled example url

See merge request gitlab-org/gitlab-ce!31442

Update requirements wording in docs

See merge request gitlab-org/gitlab-ce!31428

Merge branch '50130-cluster-cluster-details-update-automatically-after-cluster-is-created' into 'master'

Resolve "Cluster > Cluster details > Update automatically after cluster is created"

Closes #65151 and #50130

See merge request gitlab-org/gitlab-ce!27189

Only display the details of the cluster page when the cluster
exists. If it is in "creating" state, show a message and a spinner

All Kubectl command should return array by default

See merge request gitlab-org/gitlab-ce!31305

Don't run danger on stable branches

See merge request gitlab-org/gitlab-ce!31430

Update dependency @gitlab/ui to ^5.12

See merge request gitlab-org/gitlab-ce!31242

- Also, include pikaday styles through gitlab-ui

Uninstall Helm/Tiller

See merge request gitlab-org/gitlab-ce!27359

Also creates specs

Only allow Helm to be uninstalled if it's the only app

- Remove Tiller leftovers after reser command
- Fixes specs and offenses

Adds changelog file

Fix reset_command specs

Documentation - Services slack

See merge request gitlab-org/gitlab-ce!31004

Make `needs:` to require a strong reference

Closes #65512

See merge request gitlab-org/gitlab-ce!31419

Add md files to .prettierignore

See merge request gitlab-org/gitlab-ce!31426

This is to prevent prettier from auto formatting doc files.

I'm adding some wording to our hardware requirements to explain that needs vary
by workload. I also included some examples of factors that may influence the
workload.

Removes update_statistics_namespace feature flag

See merge request gitlab-org/gitlab-ce!31392

This changes `needs:` from weak reference
to have a strong reference.

This means that job will not be created
unless all needs are present as part of
a pipeline.

Resolve "Breakage in displaying SVG in the same repository"

See merge request gitlab-org/gitlab-ce!31352

Support X_if_ee methods for QA tests

See merge request gitlab-org/gitlab-ce!31379

Update HA resource descriptions

Closes #61192 and #27833

See merge request gitlab-org/gitlab-ce!31064

Respect needs on artifacts

Closes #65466

See merge request gitlab-org/gitlab-ce!31413

Improve job log rendering performance

See merge request gitlab-org/gitlab-ce!31262

Currently we write out empty CSS classes (`class=""`) every time we
create a new tag. This adds 9 unnecessary bytes per span element. In a
recent trace, I have counted 11950 span elements. So we transported 105
unnecessary kilobytes!

After measuring the impact of the namespace storage on
https://gitlab.com/gitlab-org/gitlab-ce/issues/64092. It was decided
that it's performant enough. So we can freely remove the feature flag

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/64092

Resolve docker in docker problems

See merge request gitlab-org/gitlab-ce!31417