Re-introduce the Redis set cache for branch and tag names - but don't enable it yet

See merge request gitlab-org/gitlab-ce!32412

Add Scalability/FileUploads cop

Closes gitlab-ee#14925

See merge request gitlab-org/gitlab-ce!32864

This cop prevents you from using file in API, it points you to the
development documentation about workhorse file acceleration.

Sidekiq monitor namespace change

See merge request gitlab-org/gitlab-ce!32878

CE Backport: Customisable Cycle Analytics - Add stage button

See merge request gitlab-org/gitlab-ce!31791

Imports the files needed for the custom
stage form and adds the EE specific css.

Added stub addStageMixin

Danger: Allow fixup commits if squash enabled or MR is WIP

See merge request gitlab-org/gitlab-ce!32210

Docs update jaeger url

See merge request gitlab-org/gitlab-ce!32640

Combine asset proxying content from Omnibus

See merge request gitlab-org/gitlab-ce!32807

Move Gitlab::SidekiqMonitor to namespace Gitlab::SidekiqDaemon::Monitor
 - Class name and file name change
 - File path change to lib/gitlab/sidekiq_daemon/monitor.rb
 - Update class usage/reference in other files, including documentation

Avoid filling target branch when unknown and source is default branch

Closes #62807

See merge request gitlab-org/gitlab-ce!32701

For zero-downtime deployed in a mixed code environment between 12.2 and
12.3, the branch and tag name cache is incorrectly invalidated - a push
to an old machine will not clear the redis set version of the cache on
the new machine.

This commit ensures that, in 12.3, both set and non-set versions of the
cache are invalidated, but does not write or consult the set version of
the cache. . In 12.4, it will be safe to switch branch and tag names to
the redis set cache both it and the legacy cache will be invalidated
appropriately in such a mixed code environment.

This delays the full implementation of the feature by one release, but
in the absence of a credible feature-flagging strategy, and amidst an
abundance of caution about the effects of too-eager cache expiration, I
believe this is the best approach available to us.

Merge branch 'reprazent/gitlab-ce-bvl-find-correct-variables-for-testing-translations' into 'master'

Build correct variables for testing translations

Closes #48110

See merge request gitlab-org/gitlab-ce!32871

This reverts commit c6ccc07f.

Start of fix for #21859, allow users to open files with newlines in the filenames.

Closes #21859

See merge request gitlab-org/gitlab-ce!32820

Add index on group_id column concurrently

See merge request gitlab-org/gitlab-ce!32826

This fixes previously added migration which caused timeouts on
big events table.

This makes sure we build the correct variables for testing
translations.

When translating, we could be specifying the variables in different
forms for each id:

- In the singular we could be using a `%{hash}` interpolation
- In the plural we could be using a `%d` interpolation

This changes the tests to accommodate for that: We now use the
variables used in the relevant translation id as the source for the
variables we mix in in specs.

In case the source and the target project are the same, the
source branch is the default branch, and the target branch
is not present, we will avoid prefilling the target branch
with the repository default branch. Letting the user decide.

Add EE label to repository_storage

See merge request gitlab-org/gitlab-ce!31933

Start linting for unneeded dollar signs

See merge request gitlab-org/gitlab-ce!32803

Do not use dollar signs in shell codeblocks when
no output is shown

[CE] Add event presenter

See merge request gitlab-org/gitlab-ce!32750

This presenter will be used in an upcoming MR which adds
rendering of epic events on group activity page.

Refactor the Dependency Scanning docs

See merge request gitlab-org/gitlab-ce!32582

Notably:

- Merge the use cases with the opening paragraph of DS
- Add link to the auto-remediation section in the main index page
- Add auto remediation to the title of solutions for better SEO
- Move the JSON reports section below the other more important sections
- Remove Container Scanning from the list of supported scanners in
  solutions
- Fix some "introduced in" sentences so that they can be properly parsed

Fix broken link to the handbook

See merge request gitlab-org/gitlab-ce!32849

Only CODEOWNERS on default branch affect MR approvals

See merge request gitlab-org/gitlab-ce!32841

Add user creation documentation

Closes gitlab-com/support/support-team-meta#1681

See merge request gitlab-org/gitlab-ce!32411

Avoid calling freeze on already frozen strings in lib

See merge request gitlab-org/gitlab-ce!32788