Improve blocked user tracking and fire some events only once

Closes #49784

See merge request gitlab-org/gitlab-ce!20959

Resolve "Merge request e-mail link has full URL"

Closes #49899

See merge request gitlab-org/gitlab-ce!21000

Update query simplification

Closes #49873

See merge request gitlab-org/gitlab-ce!20982

Signed-off-by: Rémy Coutable <remy@rymai.me>

Resolve "Unicorn development settings should match production as much as possible"

Closes #49756

See merge request gitlab-org/gitlab-ce!20919

Enable renaming files & folders in the Web IDE

Closes #44845

See merge request gitlab-org/gitlab-ce!20835

Removed obsolete note about manual uploads migration

Closes #49239

See merge request gitlab-org/gitlab-ce!21002

Set default timeout for deleting many refs

Closes #49862

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

We already support automatic background migrations,
`background_upload` option which enables it is already documented.

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>

Rails 5 didn't like the arel usage, see:
https://gitlab.com/gitlab-org/gitlab-ce/issues/49873#note_92040225

This change makes that right, but also makes the query nicer. I'm not
sure anymore why it didn't work before, however there were issues with
it that have been resolved.