METAL-1655: add port for Ironic Prometheus Exporter to NetworkPolicy

Signed-off-by: Dmitry Tantsur <[email protected]>

Author: dtantsur

install/0000_90_machine-api-operator_05_networkpolicy-allow-ingress-metal.yaml

@@ -27,6 +27,8 @@ spec:
       port: 6388 # ironic API proxy
     - protocol: TCP
       port: 8084 # image customization service
+    - protocol: TCP
+      port: 9608 # prometheus exporter for ironic
     - protocol: TCP
       port: 9447 # bare metal webhook service
   podSelector: {}