Cleanup policies for Artifact Registry are Generally Available (GA)

## Feature [Cleanup policies](https://cloud.google.com/artifact-registry/docs/repositories/cleanup-policy) for Artifact Registry are Generally Available (GA). Cleanup policies help you manage artifacts by automatically deleting artifacts that you no longer need, while keeping artifacts that you want to store. Deletions requested by Cleanup policies count against Artifact Registry delete request [quota and limits](https://cloud.google.com/artifact-registry/quotas).