Enable leader election in v1.14+

Use Deployment with leader election instead of StatefulSet

Deployment behaves better when a node gets disconnected
from the rest of the cluster - new provisioner leader
is elected in ~15 seconds, while it may take up to
5 minutes for StatefulSet to start a new replica.

Refer: kubernetes-csi/external-provisioner@52d1fbc

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

deploy/cephfs/kubernetes/csi-nodeplugin-rbac.yaml

@@ -1,53 +0,0 @@
----
-apiVersion: v1
-kind: ServiceAccount
-metadata:
-  name: cephfs-csi-nodeplugin
-
----
-kind: ClusterRole
-apiVersion: rbac.authorization.k8s.io/v1
-metadata:
-  name: cephfs-csi-nodeplugin
-aggregationRule:
-  clusterRoleSelectors:
-    - matchLabels:
-        rbac.cephfs.csi.ceph.com/aggregate-to-cephfs-csi-nodeplugin: "true"
-rules: []
----
-kind: ClusterRole
-apiVersion: rbac.authorization.k8s.io/v1
-metadata:
-  name: cephfs-csi-nodeplugin-rules
-  labels:
-    rbac.cephfs.csi.ceph.com/aggregate-to-cephfs-csi-nodeplugin: "true"
-rules:
-  - apiGroups: [""]
-    resources: ["configmaps"]
-    verbs: ["get", "list"]
-  - apiGroups: [""]
-    resources: ["nodes"]
-    verbs: ["get", "list", "update"]
-  - apiGroups: [""]
-    resources: ["namespaces"]
-    verbs: ["get", "list"]
-  - apiGroups: [""]
-    resources: ["persistentvolumes"]
-    verbs: ["get", "list", "watch", "update"]
-  - apiGroups: ["storage.k8s.io"]
-    resources: ["volumeattachments"]
-    verbs: ["get", "list", "watch", "update"]
-
----
-kind: ClusterRoleBinding
-apiVersion: rbac.authorization.k8s.io/v1
-metadata:
-  name: cephfs-csi-nodeplugin
-subjects:
-  - kind: ServiceAccount
-    name: cephfs-csi-nodeplugin
-    namespace: default
-roleRef:
-  kind: ClusterRole
-  name: cephfs-csi-nodeplugin
-  apiGroup: rbac.authorization.k8s.io