ovn/policy: use upstream Kube PolicyType instead of internal one
ovn/policy: use upstream Kube PolicyType instead of internal one

They're the same anyway.

Signed-off-by: Dan Williams <aeade43d0f8ae14e7c44fa81fe17c1635ae376fe@redhat.com>

shettyg/ovn-kubernetes,shettyg/ovn-kubernetes,shettyg/ovn-kubernetes