Allow setting the metrics port name

Here, we scrape every pod that has a .*-metrics port here
But the helm chart is locked to `metrics` which our Prometheus doesn't see

This PR will make it configurable with a default value of `metrics`

Signed-off-by: Julien Duchesne <julien.duchesne@grafana.com>

charts/argo-workflows/templates/controller/workflow-controller-deployment.yaml

@@ -75,7 +75,7 @@ spec:
           resources:
             {{- toYaml .Values.controller.resources | nindent 12 }}
           ports:
-            - name: metrics
+            - name: {{ .Values.controller.metricsConfig.portName }}
               containerPort: {{ .Values.controller.metricsConfig.port }}
             - containerPort: 6060
           livenessProbe: {{ .Values.controller.livenessProbe | toYaml | nindent 12 }}

charts/argo-workflows/values.yaml

@@ -57,6 +57,7 @@ controller:
     enabled: false
     path: /metrics
     port: 9090
+    portName: metrics
     servicePort: 8080
     servicePortName: metrics
   # the controller container's securityContext