Set default security policy engine to none thus requiring it be overr…

…idden when installed.

carvel-package/bundle/config/00-schema.yaml

@@ -135,7 +135,7 @@ clusterSecrets:
 
 clusterSecurity:
 
-  policyEngine: "pod-security-policies"
+  policyEngine: "none"
 
 #! User credentials for accessing training portal instances. If not specified
 #! then random passwords are generated which can be obtained from the custom