Container-registry needs to support ValKey as a key-value store/Redis replacement.

Due to legal concerns, we need to support ValKey as Redis replacement in registry for self-managed installations: https://gitlab.com/groups/gitlab-com/gl-infra/data-access/durability/-/epics/36

We don't use a lot of features, but we support all redis deployment types (instance, sentinel, cluster), so the surface area is not small.

The acceptance criteria is to have all relevant CI/CD pipelines for container registry run against ValKey and Redis. We may run into issues here with functionality parity for the images we use (i.e Redis docker image vs. ValKey docker image).