Fix rebase status check throwing flash message

Closes #4473

See merge request gitlab-org/gitlab-ee!3922

Check if shard configuration is same across Geo nodes

Closes #3243

See merge request gitlab-org/gitlab-ee!3772

Update Kubernetes service documentation

See merge request gitlab-org/gitlab-ee!3920

Fix https://gitlab.com/gitlab-org/gitlab-ee/issues/4473

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

States this service was deprecated on 10.3 and his behavior depends on
the kubernetes service status. Also includes a link for the release post
for more information.

CE Port: 41054 Disable creation of new kubernetes integrations

See merge request gitlab-org/gitlab-ee!3916

EE: Unify CE and EE tests in spec/controllers/projects/artifacts_controller_spec.rb

See merge request gitlab-org/gitlab-ee!3883

EE: Enable our own custom cops, again?

See merge request gitlab-org/gitlab-ee!3882

Show correct edition for EE free

Closes gitlab-ce#41092

See merge request gitlab-org/gitlab-ee!3894

Fix namespace ambiguity with Kubernetes Pod definitions

Closes #4468

See merge request gitlab-org/gitlab-ee!3918

This was causing a spec failure between Gitlab::Kubernetes::Helm::Pod and
Gitlab::Kubernetes::Helm::Api::Pod if one spec loaded the former
definition first.

Closes #41458

Fix a bug where branch could not be delete due to a push rule config

Closes #4078

See merge request gitlab-org/gitlab-ee!3900

Move git operations for UpdateRemoteMirrorService into Gitlab::Git

Closes gitaly#841

See merge request gitlab-org/gitlab-ee!3824

Prepare Gitlab::Git::Repository#rebase for Gitaly migration

See merge request gitlab-org/gitlab-ee!3908

Geo backend changes for Vue admin page

See merge request gitlab-org/gitlab-ee!3858

Improve closed/merged events queries performance on Projects::MergeRequestsController#show.json

See merge request gitlab-org/gitlab-ee!3679

More descriptive error when clocks between Geo nodes are out of sync

Closes #4276

See merge request gitlab-org/gitlab-ee!3860