[external-dns] Fix RBAC for istio gateways (#8223)

Signed-off-by: Ali Rizwan <ari@hellofresh.com>

stable/external-dns/Chart.yaml

@@ -3,7 +3,7 @@ description:
   Configure external DNS servers (AWS Route53, Google CloudDNS and others)
   for Kubernetes Ingresses and Services
 name: external-dns
-version: 0.7.6
+version: 0.7.7
 appVersion: 0.5.6
 home: https://github.com/kubernetes-incubator/external-dns
 sources:

stable/external-dns/templates/clusterrole.yaml

@@ -9,11 +9,13 @@ rules:
   - apiGroups:
       - ""
       - extensions
+      - networking.istio.io
     resources:
       - ingresses
       - services
       - pods
       - nodes
+      - gateways
     verbs:
       - get
       - list