Don't allow removing MR approvers when project setting is set

Closes #2807

See merge request !2395

When the `disable_overriding_approvers_per_merge_request` setting is set, we
shouldn't let people remove approvers or groups from merge requests, but should
let them do so from the project.

Added audit logs to new admin sidebar

Closes #2920

See merge request !2421

Fix duplicate related issue reference inserted when using autocomplete

Closes #2914

See merge request !2420

Closes #2920

MR branch link now links to tree instead of commits (EE)

Closes #2890

See merge request !2416

Fix https://gitlab.com/gitlab-org/gitlab-ee/issues/2914

Fix spec/helpers/award_emoji_helper_spec.rb by using `iid` instead of `id`

Closes gitlab-ee#2890

See merge request !12770

MR branch link now links to tree instead of commits

Closes #34243

See merge request !12763

Automatically link Kerberos users and LDAP people

Closes #1552

See merge request !2405

Reset available mirror capacity to 0 when it falls below 0

See merge request !2409

Artifacts store does not use default value

See merge request !2411

Fix access checks for rebasing an MR

Closes #2891

See merge request !2414

Split Elasticsearch docs to admin and user

Closes #2056

See merge request !2375

Port of CE Update vue-resource

See merge request !2378

This has been broken since 34457b30, when the feature was implemented: a user
who can merge the MR may not have access to push to the source branch, and vice
versa.

This makes the backend check the correct thing (which the UI already did):
whether the user can push to the source branch.

CE Upstream - Tuesday

Closes #2890, omnibus-gitlab#2545, and gitlab-qa#56

See merge request !2402

[ci skip]

[ci skip]

Added CE to EE update guide for 9.4

See merge request !2407

The :caching metadata was renamed to :use_clean_rails_memory_store_caching

Closes #2901

See merge request !2403

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

Revert "Merge branch '34902-bump-knapsack-to-1-14-0' into 'master'"

Closes #34942

See merge request !12783

Disabled prepared statements in test

See merge request !12773

This reverts merge request !12753

Reduce parallelization of Spinach jobs and increase the RSpec ones

Closes #34911

See merge request !12760

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