This patch provides a full mastodon setup allowing to run mastodon
instances on Kubernetes as well as migrating the existing mastodon
instance of mine to the cluster.

As part of that it switches to OIDC as authentication method and allows
to run on a Database cluster instead of a single instance.

This patch introduces an override to make PostgreSQL HA by running more
than one instance managed by the postgresql-operator.

This is a first experiments with the HA features and might become a
blue-print for further experiments.

This patch will help to keep all resources used by Nextcloud in check.

This reverts commit d1106014.

This aptch should move the ceph images used in the cluster to the
internal registry, preventing issues with quay.io to cause problems in
the cluster.

This patch replaces the vendored resources with remote ones that should
simplify a rook update in the future.