revise default policy

[itaysk]

currently it's too noisy. probably want to keep: signatures + container events

we can create another example policy with the things we removed which is more verbose

[rafaeldtinoco]

I think we should also do for the docker image, right ? (Just merged the k8s changes from Jose).

#3654 (comment)

If that is true (and without touching the "default set" of events).

[rafaeldtinoco]

The container image default events was made just like the regular k8s deployment at the PR #3687.