Use an event-based system when waiting for AuthorizedProjectsWorker to complete

See merge request !13564

[ci skip]

Improves subgroup creation permissions

Closes #35845

See merge request !13418

Hashed Storage support for Repositories

Closes #28283

See merge request !13246

Using `extend` dynamically can lead to bad performance as it
invalidates the method's cache.

Correctly encode string params for Gitaly's TreeEntries RPC

Closes #36720

See merge request !13724

Merge branch '36298-use-non-i18n-values-for-setting-new-group-level-issue-mr-button-text' into 'master'

Use non-i18n values for setting new group-level issue/MR button text

Closes #36298

See merge request !13570

Add docs for group issues page and group merge requests page

Closes #36533

See merge request !13678

Only require sidekiq-limit_fetch when enabled in settings

Closes #36253

See merge request !13715

Fix 500 errors in Atom feeds due to push events

Closes #36705

See merge request !13695

Make project selection dropdown consistent

See merge request !13562

Fix merge request head pipeline when pipeline has errors

Closes #36657

See merge request !13664

This gem allows Sidekiq jobs to be throttled. Unfortunately, it has a
side-effect: when we haven't enabled job throttling, it will still hit Redis a
lot (and miss, because nothing is configured).

As this setting already required a restart, ensure that the library is only
required when it's enabled.