e2e: add/modify deployment files for cephfs snapshot/clone tests

Add snapshot class, snapshot, restore, clone PVC and pod yamls
for e2e test to consume

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

examples/cephfs/pvc-restore.yaml

@@ -0,0 +1,16 @@
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: cephfs-pvc-restore
+spec:
+  storageClassName: csi-cephfs-sc
+  dataSource:
+    name: cephfs-pvc-snapshot
+    kind: VolumeSnapshot
+    apiGroup: snapshot.storage.k8s.io
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi