Guard the cleanupStubVGSC() call in restore finalization with a check
for VolumeGroupSnapshotHandle in volumeInfo. This avoids a spurious
warning on clusters where the v1beta2 VolumeGroupSnapshotContent CRD
is not installed, since the List call would fail even though no stubs
exist to clean up.
Fixes#9882
Signed-off-by: Shubham Pampattiwar <spampatt@redhat.com>