[cern] Add CSI and CEPH support to Kubernetes

Add a new label 'kube_csi_enabled' controlling the configuration of the
CSI provisioner and attacher. These are the basic sidecar containers
required to have additional CSI drivers - but they do not include the
configuration of any specific driver.

Additional feature gates are enabled - CSIPersistentVolume and
MountPropagation, on apiserver, controller-manager and kubelet.

Configure the ceph csi plugin by deploying the driver container in every
minion, along with the driver registrar.