cleanup: remove deprecated vm-driver option
cleanup: remove deprecated vm-driver option

$ minikube start --help
...
    --vm-driver='': DEPRECATED, use `driver` instead.
...

'vm-driver' option is deprecated at minikube v1.8.0, we should really
start using 'driver'

Related: https://github.com/kubernetes/minikube/pull/6888

Signed-off-by: Prasanna Kumar Kalever <a78d8f98557446023f5b3ba9944d7be259a978a3@redhat.com>

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