Sample policies should have related CLI apply/test

[hans-d]

Is your feature request related to a problem? Please describe.
See #1772 / #1909 / #1937. Having the sample policies run in verify/test/apply gives additional documentation on the working and also proves all are working with the current CLI.

Describe the solution you'd like
Each sample policy should have a test.yaml and additional yaml resources that proof the policy is working using the CLI.
New samples should be provided with such data before merging.

In addition:

• regular/frequent tests should be run with the current CLI version to validate all is still working.
• (newly) implemented features for policies should at minimal provide a sample policy (add to checklist)

Describe alternatives you've considered
none

[realshuting]

Thank you @hans-d for bringing this up, we'll address this issue along with #1821.

[chipzoller]

Cross linking to discussion here: #2065

[realshuting]

@viveksahu26 - since you are working on this issue, can you please comment so that I can assign it to you?

[viveksahu26]

/assign. Yes @realshuting , definitely assign me.

[viveksahu26]

Hey @realshuting, I have tried to cover all possible sample policies(both validate and mutate) which contains test.yaml files as well as resource.yaml files. So, can we close this issue now.
kyverno/policies#104
kyverno/policies#105

[viveksahu26]

And also now cli support test command for mutate policy.
#1821

[realshuting]

Thank you @viveksahu26 🎉