csi: check deployment for snapshot controller
csi: check deployment for snapshot controller

The external-snapshotter was deployed as statefulset
in 4.x and now its deployed as a deployment. updated
the check in CI to make sure deployment is created.

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

rook/rook,rook/rook,rook/rook,rook/rook,rook/rook