feat(argo-rollouts): Add possibility to configure healthz and metrics ports to be compatible with Istio (#1976)

charts/argo-rollouts/templates/controller/servicemonitor.yaml

@@ -16,7 +16,7 @@ metadata:
   {{- end }}
 spec:
   endpoints:
-  - port: metrics
+  - port: {{ .Values.controller.metrics.service.portName }}
     {{- with .Values.controller.metrics.serviceMonitor.relabelings }}
     relabelings:
       {{- toYaml . | nindent 6 }}