Check if registry can work with OCS

Before we can support OCS as a first-class storage, we need to verify that the registry can work with OCS over its S3-compatible API.

Notes

• https://access.redhat.com/articles/5977531
• https://access.redhat.com/documentation/en-us/red_hat_quay/3.5/html/deploy_red_hat_quay_on_openshift_with_the_quay_operator/installing_the_quay_operator#deciding_on_a_storage_solution