Container Registry Phase 2 gradual production rollout
## Context This is part of the work to upgrade and migrate the GitLab.com container registry to a new version backed by a metadata database and online garbage collection (https://gitlab.com/groups/gitlab-org/-/epics/5523). This will be achieved following the gradual migration plan detailed in https://gitlab.com/gitlab-org/container-registry/-/issues/374. For the gradual [Phase 2](https://gitlab.com/groups/gitlab-org/-/epics/7423) (new repositories only) production rollout, we'll split the work into 5 portions, in this order: 1. **GitLab Org**: We'll start by testing with some custom-made container repositories under `gitlab-org/` and then allow all of its new container repositories to be handled by the metadata DB; 1. **Free Tier**: Following the GitLab Org rollout, we will proceed with a general rollout for the Free tier 1. **Paid tier**: After the Free tier, we'll work through a gradual migration of paid customers, excluding major, VIP customers. 1. **Major customer** To reduce the risk of impacting users of the GitLab.com container registry that have large amounts of data, a very high activity, or very high availability/stability requirements, we will exclude these from (2) and handle them in this step with a manual gradual rollout, customer by customer.
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