Use memoization for commits on diffs

See merge request gitlab-org/gitlab-ee!3744

Resolve "Move all Geo related files to EE specific dirs"

Closes #3148

See merge request gitlab-org/gitlab-ee!3706

The hook ordering influenced the diffs being generated as these used
values from before the update due to the memoization still being in
place. This commit reorders them and tests against this behaviour.

Port of 25317-prioritize-author-date-over-commit to EE

See merge request gitlab-org/gitlab-ee!3766

Record EEU usage pings correctly

See merge request gitlab-org/gitlab-ee!3765

Use a dedicated queue for each Sidekiq worker

See merge request gitlab-org/gitlab-ee!3692

Fix rebase in IE

Closes #3501

See merge request gitlab-org/gitlab-ee!3732

Fix environment scope regex

See merge request gitlab-org/gitlab-ee!3641

Port of 38869-datetime to EE

See merge request gitlab-org/gitlab-ee!3736

Prevent adding same role multiple times on repeated clicks

Closes #4294

See merge request gitlab-org/gitlab-ee!3700

[EE port] Prevent worker that updates merge requests head pipeline from failing jobs

See merge request gitlab-org/gitlab-ee!3761

Fix indentation of TLS geo docs

See merge request gitlab-org/gitlab-ee!3769

Fix https://gitlab.com/gitlab-org/gitlab-ee/issues/3501

The hook ordering influenced the diffs being generated as these used
values from before the update due to the memoization still being in
place. This commit reorders them and tests against this behaviour.

Ee single list multiple clusters

See merge request gitlab-org/gitlab-ee!3702

Move 10.2 CE to EE update guide to correct location

See merge request gitlab-org/gitlab-ee!3756

Docs: Update admin docs

See merge request gitlab-org/gitlab-ee!3751

Resolve "Fix difference in FDW / non-FDW queries for Geo::FileRegistry queries"

Closes #4031

See merge request gitlab-org/gitlab-ee!3714

Resolve conflicts in app/controllers/groups/group_members_controller.rb and app/controllers/projects/project_members_controller.rb
Signed-off-by: Rémy Coutable <remy@rymai.me>

Refactor specific build artifacts code

See merge request gitlab-org/gitlab-ee!3689

The Gitaly CommitService is being hammered by n + 1 calls, mostly when
finding commits. This leads to this gRPC being turned of on production:
https://gitlab.com/gitlab-org/gitaly/issues/514#note_48991378

Hunting down where it came from, most of them were due to
MergeRequest#show. To prove this, I set a script to request the
MergeRequest#show page 50 times. The GDK was being scraped by
Prometheus, where we have metrics on controller#action and their Gitaly
calls performed. On both occations I've restarted the full GDK so all
caches had to be rebuild.

Current master, 806a68a8, needed 435 requests
After this commit, 154 requests