Set default timeout for deleting many refs

Closes #49862

See merge request gitlab-org/gitlab-ce!20974

Remove unused styles in tree.scss

See merge request gitlab-org/gitlab-ce!20996

Add object storage related tests for `gitlab:cleanup:project_uploads` task

See merge request gitlab-org/gitlab-ce!20950

Rouge 3.2.0

See merge request gitlab-org/gitlab-ce!20991

Make CreateGpgSignatureWorker backwards compatible with original method signature (CE port)

See merge request gitlab-org/gitlab-ce!20998

Older versions of GitPushService push a single commit SHA string to the queue,
but Gitaly requires that the parameters sent by CreateGpgSignatureWorker are
an array. It's possible to have old workers using this original signature or
jobs in the retry queue that would fail if CreateGpgSignatureWorker can't
handle the string form.

Fix failing 500 errors when deploy tokens are used to clone

Closes gitlab-ee#7080

See merge request gitlab-org/gitlab-ce!20993

Fix deploy tokens without `expire_at` crashes

Closes #49904

See merge request gitlab-org/gitlab-ce!20992

A DeployToken responds to `:username`, but it returns the username for the
token, not a User object. Don't attempt to log user activity in this case.

Closes gitlab-org/gitlab-ee#7080

Get rid of unnecessary commit action in pipelines controller

See merge request gitlab-org/gitlab-ce!20980

Fixed Web IDE row dropdowns scrolling list incorrectly

Closes #49892

See merge request gitlab-org/gitlab-ce!20984

Resolve "Top nav search bar produces console error when unauthenticated"

Closes #49861

See merge request gitlab-org/gitlab-ce!20970

Resolve "GitLab Project Import should use object storage"

Closes #48773

See merge request gitlab-org/gitlab-ce!20773

Closes #49892

Remove feature flags from lib/backup

Closes gitaly#749, gitaly#1212, and gitaly#1195

See merge request gitlab-org/gitlab-ce!20854

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Rework performance section to allow for string freezing

See merge request gitlab-org/gitlab-ce!20969

Merge branch '48834-chart-versions-for-applications-installed-by-one-click-install-buttons-should-be-version-locked' into 'master'

Resolve "Chart versions for applications installed by one click install buttons should be version locked"

Closes #48834

See merge request gitlab-org/gitlab-ce!20765

Fix indentation for artifacts example in docs

See merge request gitlab-org/gitlab-ce!20971

- Refactor uploads manager
- Refactor importer, update import spec
- Add more object storage specs

Use Helm 2.7.2 for GitLab Managed Apps

Closes #49830

See merge request gitlab-org/gitlab-ce!20956

Resolve "Remove ghost notification settings for groups and projects"

Closes #44824

See merge request gitlab-org/gitlab-ce!20567

Update GITLAB_SHELL_VERSION to 8.1.0

See merge request gitlab-org/gitlab-ce!20975

Update two_factor_authentication.md

See merge request gitlab-org/gitlab-ce!20943

Enable frozen string in app/models/*.rb

See merge request gitlab-org/gitlab-ce!20851

Filter diff files by given path on DB instead Ruby

See merge request gitlab-org/gitlab-ce!20940

Resolve "Link to the runners page should automatically expand the runners settings"

Closes #49851

See merge request gitlab-org/gitlab-ce!20967

Refactor gitlab:import:repos task to remove direct disk access

Closes gitaly#953

See merge request gitlab-org/gitlab-ce!20864

Prior to this change, this RPC had a fast_timeout. This timeout doesn't
set no timeout on Sidekiq. Deleting many refs can take over a couple of
seconds, so a default timeout would be neccesairy.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/49862