Feature: Ignore tests via object annotations

[zegl]

Currently it's only possible to ignore a test on the whole test run, with the --ignore-test flag.

My suggestion of how to get more fine controlled ignores, is to add annotation support for this.

kube-score can look for the annotation kube-score/ignore in every object that it's parsing, and ignore the tests for only that object.

A full example would look like this:

version: v1
kind: Service
metadata:
  annotations:
    kube-score/ignore: service-type,stable-version

[zegl]

This was fixed in #87