Add xfs fstype as default type in storageclass
Add xfs fstype as default type in storageclass

we have see better performace in device
format and mounting by setting the fstype to xfs
from default ext4.

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

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