frontend: add PeerAuthentication resource for metrics

This change disables mTLS for the metrics port otherwise the collection
fails because Envoy rejects the scrape request. It is similar to what
exists for the Maestro server.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

frontend/deploy/helm/frontend/templates/peerauthentication.yaml

@@ -0,0 +1,11 @@
+apiVersion: security.istio.io/v1beta1
+kind: PeerAuthentication
+metadata:
+  name: aro-hcp-frontend-metrics
+spec:
+  selector:
+    matchLabels:
+      app: aro-hcp-frontend
+  portLevelMtls:
+    8081:
+      mode: PERMISSIVE