Fixup #2970: Add Missing Label app.kubernetes.io/part-of: ingress-nginx

-    Add missing label `app.kubernetes.io/part-of: ingress-nginx` for deploy example
-    Update new labels for docs/deploy and docs/examples
-    Update new labels for test/e2e and test/manifests
-    Update new labels for images/nginx

Also close #3001

docs/examples/multi-tls/multi-tls.yaml

@@ -3,7 +3,8 @@ kind: Service
 metadata:
   name: nginx
   labels:
-    app: nginx
+    app.kubernetes.io/name: ingress-nginx
+    app.kubernetes.io/part-of: ingress-nginx
 spec:
   ports:
   - port: 80
@@ -11,18 +12,23 @@ spec:
     protocol: TCP
     name: http
   selector:
-    app: nginx
+    app.kubernetes.io/name: ingress-nginx
+    app.kubernetes.io/part-of: ingress-nginx
 ---
 apiVersion: v1
 kind: ReplicationController
 metadata:
   name: nginx
+  labels:
+    app.kubernetes.io/name: ingress-nginx
+    app.kubernetes.io/part-of: ingress-nginx
 spec:
   replicas: 1
   template:
     metadata:
       labels:
-        app: nginx
+        app.kubernetes.io/name: ingress-nginx
+        app.kubernetes.io/part-of: ingress-nginx
     spec:
       containers:
       - name: nginx
@@ -35,7 +41,8 @@ kind: Service
 metadata:
   name: http-svc
   labels:
-    app: http-svc
+    app.kubernetes.io/name: http-svc
+    app.kubernetes.io/part-of: ingress-nginx
 spec:
   ports:
   - port: 80
@@ -43,18 +50,23 @@ spec:
     protocol: TCP
     name: http
   selector:
-    app: http-svc
+    app.kubernetes.io/name: http-svc
+    app.kubernetes.io/part-of: ingress-nginx
 ---
 apiVersion: v1
 kind: ReplicationController
 metadata:
   name: http-svc
+  labels:
+    app.kubernetes.io/name: http-svc
+    app.kubernetes.io/part-of: ingress-nginx
 spec:
   replicas: 1
   template:
     metadata:
       labels:
-        app: http-svc
+        app.kubernetes.io/name: http-svc
+        app.kubernetes.io/part-of: ingress-nginx
     spec:
       containers:
       - name: http-svc
@@ -113,4 +125,4 @@ spec:
       - backend:
           serviceName: nginx
           servicePort: 80
-        path: /
+        path: /