tests: k8s: improve the Agent Policy tests

[danmihai1]

• Don't blindly apply the "allow all" policy to all the test yaml files - even to files that don't need a policy (e.g., ConfigMap|LimitRange|Namespace|PersistentVolume|PersistentVolumeClaim|RuntimeClass|Secret|Service don't need policy)

• Reduce the run_kubernetes_tests.sh complexity, by replacing all of its commands that are directly related to policy

• Add the "allow all" policy just to test yaml files that need a policy (Pod|Deployment|Job|ReplicationController) and that are not being tested using a policy auto-generated by the genpolicy tool

[ChengyuZhu6]

@danmihai1 , I recommend to call set_metadata_annotation to apply annotation.

kata-containers/tests/integration/kubernetes/lib.sh

Lines 177 to 193 in c163d9f

	set_metadata_annotation() {
	local yaml="${1}"
	local key="${2}"
	local value="${3}"
	local metadata_path="${4:-}"
	local annotation_key=""
	[ -n "$metadata_path" ] && annotation_key+="${metadata_path}."
	# yaml annotation key name.
	annotation_key+="metadata.annotations.\"${key}\""
	echo "$annotation_key"
	# yq set annotations in yaml. Quoting the key because it can have
	# dots.
	yq write -i --style=double "${yaml}" "${annotation_key}" "${value}"
	}

[danmihai1]

@ChengyuZhu6 thanks! I think that's a good idea but I think we should perform this additional cleanup in a separate PR. I explained my thoughts in #9405 .

[ChengyuZhu6]

Same comment as above.

[danmihai1]

/test