Rearrange deployment files into kustomizations

deploy/aws/nlb/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+bases:
+- ../../cloud-generic
+patchesStrategicMerge:
+- service-nlb.yaml

deploy/aws/nlb/service-nlb.yaml

@@ -0,0 +1,7 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: ingress-nginx
+  annotations:
+    # by default the type is elb (classic load balancer).
+    service.beta.kubernetes.io/aws-load-balancer-type: nlb