This documents the changes needed to store objects in Azure:

1. Rails changes:
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/38882

2. Rails changes for custom domains:
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/40694

3. Workhorse changes:
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/555

4. Workhorse changes for custom domains:
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/575

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/25877