Add tests to cover auto-gen rules

[realshuting]

After #518 , all the best practices which apply to pod will automatically generate a rule applying on pod controllers. Need to test all the best practices to make sure they are working as expected, also violation should be reported correctly.

[JimBugwadia]

We need to add tests to cover auto-generated rules on Pod Controllers and also add more negative test cases.

[realshuting]

Let's add tests to cover auto-gen feature, we can de-prioritize violation check.

[daviddyball]

EDIT: Raised a separate issue to track my bug.

[chipzoller]

Unclear if this now refers to tests in kyverno/policies or e2e tests which are outside those.

[realshuting]

Let's close this issue as it lasts for a long time. Will try to create precise issues next time!