[EE] Upgrade Rubocop to 0.68.1

See merge request gitlab-org/gitlab-ee!11982

Merge branch '5523-geo-relative-url-roots-in-external_url-causes-redirect-loop-on-secondary-login' into 'master'

Geo: Fix OAuth authentication with relative URLs

Closes #5523

See merge request gitlab-org/gitlab-ee!11976

Document Prometheus app can be uninstalled

Closes #60665

See merge request gitlab-org/gitlab-ce!28098

Upgrade to Rubocop 0.68.1

See merge request gitlab-org/gitlab-ce!28046

Docs: Realigning scattered EE docs into CE

See merge request gitlab-org/gitlab-ce!28102

Add troubleshooting step for older docker clients to registry documentation

Closes omnibus-gitlab#4195

See merge request gitlab-org/gitlab-ce!27917

* The container registry needs a compatibility setting enabled for older
docker clients. This will document how to enable the setting for
omnibus and source installations.

Document packages_size statistics API

See merge request gitlab-org/gitlab-ee!12213

Edit regionendpoint text

See merge request gitlab-org/gitlab-ce!27928

Docs: Change geo redirects to relative to match EE

See merge request gitlab-org/gitlab-ce!28100

Remove most docs from  ee_specific_check whitelist

Closes gitlab-ce#61269, gitlab-ce#59151, gitlab-ce#61362, gitlab-ce#61272, gitlab-ce#59156, gitlab-ce#60845, gitlab-ce#60838, gitlab-ce#60841, and gitlab-ce#61073

See merge request gitlab-org/gitlab-ee!12286

Docs: Second Attempt to realign administration/geo docs

See merge request gitlab-org/gitlab-ce!28099

Docs: (EE Port) Second Attempt to realign administration/geo docs

See merge request gitlab-org/gitlab-ee!12288

Remove doc/gitlab-geo from whitelist

Closes gitlab-ce#60839

See merge request gitlab-org/gitlab-ee!11871

Remove doc/administration/high_availability from whitelist

Closes gitlab-ce#60832

See merge request gitlab-org/gitlab-ee!12105

Docs: Merge EE doc/administration/high_availability to CE

See merge request gitlab-org/gitlab-ce!27985

Docs: (EE Port) Merge EE doc/administration/high_availability to CE

See merge request gitlab-org/gitlab-ee!12107

Even though `rubocop --auto-gen-config` was run, it looks like some
files still needed to be corrected.

Docs: Merge EE doc/gitlab-geo to CE

See merge request gitlab-org/gitlab-ce!27656

Remove doc/project/*.md from whitelist

Closes gitlab-ce#59159

See merge request gitlab-org/gitlab-ee!12102