kyverno_pod_policy: don't autogenerate validation rules

We are only interested in Enforcing pods at this point.

Enforcing some pod-generators only create confusion and noise (and some errors) at this point, because plenty of those were created by jobs-cli and webservice when they did not have the right pod templates.

Bug: T368141 Bug: T362050 Signed-off-by: Arturo Borrero Gonzalez aborrero@wikimedia.org