[FEAT] - Onboard Ceph clusters with managed authentication & authorization and basic kube-system, kube-monitoring.

[auhlig]

Umbrella issue for tracking Ceph integration.
Granular sub-issues can be found via label WP2.3.4.7 Ceph integration.

Greenhouse must support operational tooling required by the upcoming Ceph implementation.
Coordinate efforts with @jknipper, @defo89, @SchwarzM.

Acceptance criteria:

• Ceph k8s clusters onboarded to Greenhouse
• Greenhouse-managed plugins in cluster: Kube-monitoring, ingress, cert-manager, disco, etc.
• Kubernetes access management based on Greenhouse teams