Merge release 1.14 into 1.15. (#16439)

1. Confirm the document content is similar as en version.
2. Merge the zh release-1.14 version into 1.15 version
3. add the 1.14 all sample into 1.15 for template work. The build looks fine.

- docs
  - concepts
    - architecture

content/zh/examples/service/access/frontend.yaml

@@ -0,0 +1,39 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+spec:
+  selector:
+    app: hello
+    tier: frontend
+  ports:
+  - protocol: "TCP"
+    port: 80
+    targetPort: 80
+  type: LoadBalancer
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: frontend
+spec:
+  selector:
+    matchLabels:
+      app: hello
+      tier: frontend
+      track: stable
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: hello
+        tier: frontend
+        track: stable
+    spec:
+      containers:
+      - name: nginx
+        image: "gcr.io/google-samples/hello-frontend:1.0"
+        lifecycle:
+          preStop:
+            exec:
+              command: ["/usr/sbin/nginx","-s","quit"]