e2e: update cephfs ROX test case
e2e: update cephfs ROX test case

updated cephfs ROX test case to create
ROX Clone PVC instead of creating an empty PVC

Signed-off-by: Madhu Rajanna <60fbf37a92c2a0908e31296d18dadbec5a4dae17@gmail.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi