Also refactor setting flags for running kpod

* Remove duplicate definitions of storage-related flags for kpod, since
  we set them in helpers.bash now, and the other locations that were
  also setting it were doing so after loading the definitions in
  helpers.
* Set kpod storage flags after checking if we need to force use of the
  "vfs" storage driver for cri-o, to make sure kpod also ends up with
  the same override if we're using one.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

test/cgroups.bats

@@ -37,4 +37,4 @@ function teardown() {
 	cleanup_ctrs
 	cleanup_pods
 	stop_crio
-}
+}