tools: Allow setting policy rego file via

environment variable

* Set policy file via env var

* Add restrictive policy file to kata-opa folder

* Change restrictive policy file name

* Change relative default path location

* Add license headers

Signed-off-by: Saul Paredes <saulparedes@microsoft.com>

tests/integration/kubernetes/setup.sh

@@ -29,6 +29,7 @@ else
 	K8S_TEST_POLICY_FILES=( \
 		"allow-all.rego" \
 		"allow-all-except-exec-process.rego" \
+		"allow-set-policy.rego" \
     )
 fi