explicitly sets istio lb to be internal lb

examples/complete/envs/dev/patch-bigbang.yaml

@@ -45,7 +45,13 @@ spec:
         kiali:
           dashboard:
             auth:
-              strategy: "anonymous"     # Turn off authentication for kiali dashboard
+              strategy: "anonymous"   
+        ingressGateway:
+          serviceAnnotations:
+            # Ensure mission apps have internal load balancer only
+            service.beta.kubernetes.io/aws-load-balancer-internal: "true"
+            # Enable cross zone load balancing
+            service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled: "true"
 
     gatekeeper:
       # Directly modify chart values for dev workloads