e2e: add example yamls for RWOP POD and PVC

This commit add example yamls for RBD and CephFS Pod and PVCs

RBD:
 Raw Block Volume and File Mode PVCs with RWOP accessmode
 Raw Block Volume POD and FileMode POD yamls referring RWOP PVC

CephFS:
 RWOP PVC and POD yaml referring RWOP PVC

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

examples/cephfs/pod-rwop.yaml

@@ -0,0 +1,17 @@
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: csi-cephfs-demo-rwop-pod
+spec:
+  containers:
+    - name: web-server
+      image: docker.io/library/nginx:latest
+      volumeMounts:
+        - name: mypvc
+          mountPath: /var/lib/www
+  volumes:
+    - name: mypvc
+      persistentVolumeClaim:
+        claimName: csi-cephfs-rwop-pvc
+        readOnly: false