Test registry-next upgrade

Under Epic let's first test the upgrade with registry-next.cern.ch to v2.11.1.

• confirm backup and recovery after the upgrade
  • all the images and charts are available
• take DBoD backup and confirm that metadata is properly restored
  • projects, users, roles, replication policies, tag retention policies, scanners, charts, and images metadata

Here, we can also confirm the recovery of the registry.cern.ch s3 backup.