Add docs on tuning Geo for parallelism

See merge request gitlab-org/gitlab-ee!3665

Transfer job archives after creation

See merge request gitlab-org/gitlab-ee!3646

Resolve "Geo - Send GitLab version in status page and verify that all versions are the same"

Closes #2115

See merge request gitlab-org/gitlab-ee!3667

Port of mk-add-old-attachments-to-uploads-table to EE

See merge request gitlab-org/gitlab-ee!3401

Fix message when pushing to Geo secondary

Closes #3945

See merge request gitlab-org/gitlab-ee!3616

Use relative _path helper URLs in the GitLab UI -- EE merge edition

Closes gitlab-ce#40825

See merge request gitlab-org/gitlab-ee!3676

Resolve "GeoNodeStatus calculates numbers inefficiently"

Closes #3699

See merge request gitlab-org/gitlab-ee!3595

Add epic information to issue sidebar

Closes #3696

See merge request gitlab-org/gitlab-ee!3579

Integrated Browser Performance Testing

Closes #3046

See merge request gitlab-org/gitlab-ee!3507

Replace absolute URLs on related branches/MRs with relative url to avoid hostname -- EE merge edition

See merge request gitlab-org/gitlab-ee!3626

Add system notes for issue - epic association

Closes #3947

See merge request gitlab-org/gitlab-ee!3674

Improve geo docs based on geo demo on Dec 5

Closes #4138

See merge request gitlab-org/gitlab-ee!3648

Empty repo ee

See merge request gitlab-org/gitlab-ee!3673