Update disaster recovery manual with new steps

Closes #1921

See merge request gitlab-org/gitlab-ee!3600

Add a security-review page for Geo

Closes #4074

See merge request gitlab-org/gitlab-ee!3729

Remove Elasticsearch from services for Geo 9.6 specs to save memory

See merge request gitlab-org/gitlab-ee!3770

Refactor audit events docs

Closes #4108

See merge request gitlab-org/gitlab-ee!3625

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

Possible fix to #4259

[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