OZG-7573 add grpc port to service

src/main/helm/templates/service.yaml

@@ -32,9 +32,11 @@ metadata:
     component: eingang-adapter-service
 spec:
   ports:
+  {{- if (.Values.forwarding).enabled }}
     - name: grpc-9090
       port: 9090
       protocol: TCP
+  {{- end }}
     - name: http
       port: 8080
       protocol: TCP