Changes from docs review

Update moment to 2.22.2

Closes #53273

See merge request gitlab-org/gitlab-ce!22648

Update GitLab Pages to v1.3.0

See merge request gitlab-org/gitlab-ce!22666

Replace deprecated uniq on a Relation with distinct

See merge request gitlab-org/gitlab-ce!22625

Rename 'sast_container' licensed feature

See merge request gitlab-org/gitlab-ce!22662

Upgrade whitequark/parser to 2.5.3.0

See merge request gitlab-org/gitlab-ce!22652

Delete job_spec.js

See merge request gitlab-org/gitlab-ce!22664

Truncate milestone title on collapsed sidebar

See merge request gitlab-org/gitlab-ce!22624

Fix broken "Show whitespace changes" button on MR "Changes" tab

Closes #52122

See merge request gitlab-org/gitlab-ce!22539

Remove all tables from Pipeline page when there is no job for the Pipeline

Closes #45669

See merge request gitlab-org/gitlab-ce!18540

Extract ee specific lines for issues and mr controllers

See merge request gitlab-org/gitlab-ce!22569

Fix open-ended params for api_json.log

Closes #53155

See merge request gitlab-org/gitlab-ce!22623

adds warning against Postgres across NFS

See merge request gitlab-org/gitlab-ce!22278

CE Backport: Show actual Milestone dates within tooltips for Milestones in Epics sidebar

See merge request gitlab-org/gitlab-ce!22653

post merge pipeline and environments status

Closes #47799

See merge request gitlab-org/gitlab-ce!22292

Clarify last board navigation documentation

Closes gitlab-ee#7760

See merge request gitlab-org/gitlab-ce!22618

`Create a new tag` json Missing double quotes

See merge request gitlab-org/gitlab-ce!22614

Models and migrations for group level clusters

See merge request gitlab-org/gitlab-ce!22307

Add None/Any options for assignee in search bar

Closes #52383

See merge request gitlab-org/gitlab-ce!22599

Backport CE route changes for Ops Dashboard in EE

See merge request gitlab-org/gitlab-ce!22640

Fixing count on Milestones

Closes #50848

See merge request gitlab-org/gitlab-ce!21446

Merge branch '52780-stale-pipeline-status-cache-for-_project-after-disabling-pipelines' into 'master'

Resolve "Stale pipeline status cache for `_project` after disabling pipelines"

Closes #52780

See merge request gitlab-org/gitlab-ce!22589

This squelches the following warning:

warning: parser/current is loading parser/ruby24, which recognizes
warning: 2.4.4-compliant syntax, but you are running 2.4.5.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.

Even though we currently only should have one group for a cluster, we
allow the flexibility to associate to other groups in the future.

This also matches the runner <=> groups association.

- Adds Cluster#first_group, aliased to Cluster#group. For the
conceivable future, a cluster will have at most one group.

- Prevent mixing of group and project clusters. If project type
clusters, it should only have projects assigned.  Similarly with groups.

- Default cluster_type to :project_type. As it's very small table we can
set default and null: false in one release.

Update links to external sites

See merge request gitlab-org/gitlab-ce!22578

Add failure reason for execution timeout

See merge request gitlab-org/gitlab-ce!22224

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

remove duplicate section for enabling at project level

See merge request gitlab-org/gitlab-ce!22627