Fix ServiceMonitor RBAC for authenticated metrics endpoints

Add /metrics nonResourceURL permission to allow Prometheus in OCP
to access authenticated metrics without HTTP 500 errors.

Author: anik120

deploy/chart/templates/0000_90_olm_00-service-monitor.yaml

@@ -87,4 +87,8 @@ rules:
   - get
   - list
   - watch
+- nonResourceURLs:
+  - "/metrics"
+  verbs:
+  - get
 {{ end }}