make use of configurable fsType in the templates.

[humblec]

With latest version (v2.0.1) of external provisioner, its now possible to configure fstype . The fstype on provisioned PVs no longer defaults to "ext4". A defaultFStype arg is added to the provisioner. Admins can also specify this fstype via storage class parameter. If fstype is set in storage class parameter, it will be used. The sidecar arg is only checked if fstype is not set in the SC param

Reference # kubernetes-csi/external-provisioner#400

We could change our deployment template to have this in the examples and can also adjust the sidecar arg accordingly.

[Madhu-1]

this should be fixed in #1653 reassigning to @agarwal-mudit as he is working on his one.