Add tests that verify that this falco is backwards compatible with the
v4 k8s audit rules file. It includes tests for:
- checking images by repository/image:
ka.req.container.image/ka.req.container.image.repository
- checking privileged status of any container in a pod:
ka.req.container.privileged
- checking host_network: ka.req.container.host_network
The tests were copied from the v5 versions of the tests, when necessary
adding back v4-compatible versions of macros like
allowed_k8s_containers.
Signed-off-by: Mark Stemm <mark.stemm@gmail.com>
