tests: k8s: reduce policy testing complexity

Don't add the "allow all" policy to all the test YAML files anymore.

After this change, the k8s tests assume that all the Kata CI Guest
rootfs image files either:

- Don't support Agent Policy at all, or
- Include an "allow all" default policy.

This relience/assumption will be addressed in a future commit.

Fixes: #9395

Signed-off-by: Dan Mihai <dmihai@microsoft.com>

tests/integration/kubernetes/run_kubernetes_tests.sh

@@ -131,14 +131,6 @@ add_policy_to_yaml() {
 	esac
 }
 
-add_policy_to_successful_tests() {
-	info "Add policy to test YAML files"
-	for K8S_TEST_YAML in runtimeclass_workloads_work/*.yaml
-	do
-		add_policy_to_yaml "${K8S_TEST_YAML}"
-	done
-}
-
 test_successful_actions() {
 	info "Test actions that must be successful"
 	for K8S_TEST_ENTRY in ${K8S_TEST_UNION[@]}
@@ -169,7 +161,6 @@ fi
 if policy_tests_enabled; then
 	ensure_yq
 	run_policy_specific_tests
-	add_policy_to_successful_tests
 else
 	info "Policy tests are disabled on this platform"
 fi