Workhorse to send raw diff and patch for commits

Closes gitaly#1196

See merge request gitlab-org/gitlab-ce!18974

Remove unneccessary imports

See merge request gitlab-org/gitlab-ce!18993

Add dot to separate system notes content

Closes #45676

See merge request gitlab-org/gitlab-ce!18864

Delete remote uploads

Closes #45425

See merge request gitlab-org/gitlab-ce!18698

API support + Improved policies for group runners

Closes #45894 and #38979

See merge request gitlab-org/gitlab-ce!18851

Fix contributors graph width

Closes #22647

See merge request gitlab-org/gitlab-ce!18639

Fix Error 500 viewing admin page due to statement timeouts

Closes #46255

See merge request gitlab-org/gitlab-ce!18982

fixed copy to cliboard button in embedded snippets

Closes #46303

See merge request gitlab-org/gitlab-ce!18923

Adjust board lists header text color

Closes #36983

See merge request gitlab-org/gitlab-ce!18955

Uses PostgreSQL tuple estimates to provide a much faster yet approximate
count. See https://wiki.postgresql.org/wiki/Slow_Counting for more details.
We only use this fast method if the table has been analyzed or vacuumed
within the last hour.

Closes #46255

Remove table-section from div holding cluster error messages

See merge request gitlab-org/gitlab-ce!18971

edit GitLab license info in regards to CC licensing

See merge request gitlab-org/gitlab-ce!18981

Move discussion and notes actions to the right

Closes #33645

See merge request gitlab-org/gitlab-ce!18476

Fix GitLab Performance Monitoring content types for Doorkeeper

Closes #46412

See merge request gitlab-org/gitlab-ce!18984

Project Sidebar: Split CI/CD into CI/CD and Operations

Closes #43673

See merge request gitlab-org/gitlab-ce!18941

Move Gitlab::Git::Repository#add_branch to mandatory

Closes gitaly#540

See merge request gitlab-org/gitlab-ce!18939

Certain controllers (e.g. Doorkeeper::TokensController) don't expose the
method "request_format". This commit changes
Gitlab::Metrics::WebTransaction so we don't rely on this method, instead
using the underlying code this method uses.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/46412

Remove docker pull prefix from registry clipboard feature

Closes #46314 and #45968

See merge request gitlab-org/gitlab-ce!18933

Prior to this change, this was done through unicorn. In theory this
could time out. Workhorse has been sending these raw patches and diffs
for a long time and is stable in doing so.

Added bonus is the fact that `Commit#to_patch` can be removed.

`Commit#to_diff` too, which closes
https://gitlab.com/gitlab-org/gitaly/issues/324

Closes https://gitlab.com/gitlab-org/gitaly/issues/1196

Docs fe vuex updates

See merge request gitlab-org/gitlab-ce!18826

Document the 3h timeout for GitLab.com shared Runners

See merge request gitlab-org/gitlab-ce!18983

destroy_all loads all records at once

ObjectStore uploader requires presence of associated `uploads` record
when deleting the upload file (through the carrierwave's after_commit
hook) because we keep info whether file is LOCAL or REMOTE in `upload`
object.

For this reason we can not destroy uploads as "dependent: :destroy" hook
because these would be deleted too soon. Instead we rely on
carrierwave's hook to destroy `uploads` in after_commit hook.

But in before_destroy hook we still have to delete not-mounted uploads
(which don't use carrierwave's destroy hook). This has to be done in
before_Destroy instead of after_commit because `FileUpload` requires
existence of model's object on destroy action.

This is not ideal state of things, in a next step we should investigate
how to unify model dependencies so we can use same workflow for all
uploads.

Related to #45425

Add documentation for bulk editing of issues and merge requests

Closes #41873

See merge request gitlab-org/gitlab-ce!16614