This changes the style of push events that remove tags or branches so
they don't display the commit details. This prevents displaying commit
details such as:

    000000 . --broken encoding

Instead we now simply display the header such as:

    Administrator deleted branch example-branch

This is displayed in the same style as events for newly created
branches/tags.

This commit also ensures that if no commit message is present we simply
don't display anything, instead of "--broken encoding".

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36685
Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36722

Fix caching of future broadcast messages

Closes #36661

See merge request !13667

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

This changes the caching mechanism so we cache both current _and_ future
broadcast messages, then manually filter out those we don't want to
display. This ensures we don't need any additional queries while still
being able to display the right messages at the right time.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36661

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