Fix CE install link for downgrade docs

Closes #44273

See merge request gitlab-org/gitlab-ce!17757

Add version available info to integrity check rake task docs

See merge request gitlab-org/gitlab-ce!17799

Update flipper 0.11.0 -> 0.13.0

See merge request gitlab-org/gitlab-ce!17722

Update knapsack to 1.16.0

Closes #44235

See merge request gitlab-org/gitlab-ce!17735

Resolve "Technical debt: `Service#disabled_title` no longer used and is left dangling in `services/_form.html.haml`"

Closes #43522

See merge request gitlab-org/gitlab-ce!17305

Cache table_exists?('application_settings') to reduce repeated schema reloads

Closes #43355

See merge request gitlab-org/gitlab-ce!17781

Cache column_exists? for application settings

See merge request gitlab-org/gitlab-ce!17780

Fixes merge request bar styling when performance bar is visible

See merge request gitlab-org/gitlab-ce!17778

Rename SAST for Docker to Container Scanning in documentation

See merge request gitlab-org/gitlab-ce!17769

Revert "Merge branch 'update-httparty' into 'master'"

See merge request gitlab-org/gitlab-ce!17789

This reverts merge request !17737

[ci skip]

Closes #43355

Rename style to style guide in new frontend guide

See merge request gitlab-org/gitlab-ce!17725

This is most a backport of
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/4987/diffs but includes
other columns that use column_exists? in a way that may cause unnecessary
schema loads.

Fix import helper spec when a previous spec stubs settings

Closes gitlab-ee#5303

See merge request gitlab-org/gitlab-ce!17776

Add realtime pipeline status component for files

Closes #42927

See merge request gitlab-org/gitlab-ce!17705

Resolve "Reduce Redis usage from merge request diffs caching"

Closes #44191

See merge request gitlab-org/gitlab-ce!17746

This should use stub_omniauth_setting, not do it manually.

Drop jquery-rails gem from Gemfile

Closes #44306

See merge request gitlab-org/gitlab-ce!17771

Add labeled issues seed

Closes #41724

See merge request gitlab-org/gitlab-ce!17754

Add slash command for moving an issue

See merge request gitlab-org/gitlab-ce!17691

Manually escape '#' when building relative uris, closes #42459

Closes #42459

See merge request gitlab-org/gitlab-ce!17679

Carried over from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8857

Introduce CI/CD variables collection

Closes #33042

See merge request gitlab-org/gitlab-ce!14439

Remove RSpec warnings from `spec/models/ci/build_spec.rb`

See merge request gitlab-org/gitlab-ce!17755

Fix concurrency issue with migration for user_interacted_projects table.

Closes #44205

See merge request gitlab-org/gitlab-ce!17728

Add HTML style guide

See merge request gitlab-org/gitlab-ce!17616

This may lead to some being evicted and having to be cached again, but many MRs
get closed or updated in that time anyway.

Previously, we kept them all in the cache. We don't need the highlight results
for older diffs - if someone does view that (which is rare), we can do the
highlighting on the fly.

Add frontend guide principles

See merge request gitlab-org/gitlab-ce!17613