Add metrics port to allow ingress traffic in the netpols (bitnami-labs#1473)

**Description of the change**

Include metrics port to allow ingress traffics when the network policies
are enabled.

**Benefits**

Allow metrics traffic

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- fixes bitnami-labs#1469

Signed-off-by: Alvaro Neira Ayuso <[email protected]>

Author: alvneiayu

helm/sealed-secrets/templates/networkpolicy.yaml

@@ -14,6 +14,7 @@ spec:
   ingress:
     - ports:
       - port: {{ .Values.service.port }}
+      - port: {{ .Values.metrics.service.port }}
   {{- if .Values.networkPolicy.egress.enabled }}
   egress:
     - to: