fix(kube-system): Repair quorum idea for masters

This patch fixes the usage of the PodDisruptionBudget (PDB) in order to
achieve a quorum functionality for the master nodes by deploying a pause
container on all of them. Main reason to do that, is the inability of a
PDB to operate on static-pods or daemonsets. Therefore this deployment
will make sure, that only one master node will become unavailable at the
time.