Simplify database replication instructions and make dryer

Closes #4254 and #4265

See merge request gitlab-org/gitlab-ee!3682

Combine ssh docs and rename the doc

Closes #4267

See merge request gitlab-org/gitlab-ee!3753

fix formatting of parameters for new group and transfer project to group

See merge request gitlab-org/gitlab-ee!3758

Add deprecated page back in

See merge request gitlab-org/gitlab-ee!3788

Replace gl.utils.formatDate in place of exported function

Closes #4347

See merge request gitlab-org/gitlab-ee!3789

Docs: update documentation guidelines

See merge request gitlab-org/gitlab-ee!3739

Import gitlab_projects.rb from gitlab-shell (EE version)

See merge request gitlab-org/gitlab-ee!3782

Closes #4347

Show clear message when set-geo-primary-node was successful

Closes #2177

See merge request gitlab-org/gitlab-ee!3768

Docs: add indexes for monitoring and performance monitoring

See merge request gitlab-org/gitlab-ee!3785

Add commit diff discussion in merge request context documentation

See merge request gitlab-org/gitlab-ee!3786

[EE] Update flipper to 0.11.0 and take advantage of the new features

See merge request gitlab-org/gitlab-ee!3775

EE port of ph-es-modules

See merge request gitlab-org/gitlab-ee!3779

Resolve "Show results from docker image scan in the merge request widget"

Closes #4249

See merge request gitlab-org/gitlab-ee!3672

Remove unnecessary newline in audit_event_presenter.rb

See merge request gitlab-org/gitlab-ee!3778

[EE] Include project in BatchLoader key to prevent returning blobs for the wrong project

Closes #4325

See merge request gitlab-org/gitlab-ee!3777

By importing this Ruby code into gitlab-rails (and gitaly-ruby), we avoid
200ms of startup time for each gitlab_projects subprocess we are eliminating.

By not having a gitlab_projects subprocess between gitlab-rails / sidekiq and
any git subprocesses (e.g. for fork_project, fetch_remote, etc, calls), we can
also manage these git processes more cleanly, and avoid sending SIGKILL to them

CE upstream - Tuesday

Closes gitaly#816, gitlab-com/infrastructure#3250, gitaly#795, gitlab-ce#40825, gitaly#699 et gitlab-com/infrastructure#2725

See merge request gitlab-org/gitlab-ee!3731

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

- Added an ActiveSupport (using Rails.cache) caching adapter
- Overview of the new features can be found at https://johnnunemaker.com/flippin-features-at-runtime/
- Full Changelog can be found at https://github.com/jnunemaker/flipper/blob/v0.11.0/Changelog.mdSigned-off-by: Rémy Coutable <remy@rymai.me>

Remove Elasticsearch from services for Geo 9.6 specs to save memory

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

Closes gitlab-org/gitlab-ee#2177.

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