Adds Rack Attack disabled by default notice to the docs

See merge request gitlab-org/gitlab-ee!4399

Support SendURL for performing indirect download of artifacts if clients does…

See merge request gitlab-org/gitlab-ee!4401

Support SendURL for performing indirect download of artifacts if clients does not specify that it supports that

Use Workhorse 3.6.0 as this is the first version that implements send-url:.

EE: Trace as artifacts (FileStorage and ObjectStorage)

Closes #4171

See merge request gitlab-org/gitlab-ee!4258

Port 16799 to EE

See merge request gitlab-org/gitlab-ee!4389

Fix path for Geo seeds file

Closes #4819 and gitlab-development-kit#320

See merge request gitlab-org/gitlab-ee!4390

This reverts commit 3603e7c3a2cfd88e8441c5d76303645776349117.