Test Geo secondary mimicry
## Background
At this point, the implementation of https://gitlab.com/groups/gitlab-org/-/epics/5914 should be finished and enabled on staging. Now we expect https://geo.staging.gitlab.com to behave the same as https://staging.gitlab.com.
### Before
https://geo.staging.gitlab.com is read-only. For example, attempting to create a project fails with an error.
### After
https://geo.staging.gitlab.com acts just like https://staging.gitlab.com. For example, attempting to create a project succeeds.
## Purpose
Before releasing the feature to customers, defaulted on, it needs to be thoroughly validated. Ideally, this means testing a wide range of GitLab features, especially any that the Geo team is unfamiliar with.
## Proposal
1. We are asking teams to smoke test their features on https://geo.staging.gitlab.com and raise any unexpected behavior.
1. After internal testing and addressing major issues, we are asking interested Geo customers to beta test this feature.
epic