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/federation/policy-engine-service.yaml

@@ -0,0 +1,13 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: opa
+  namespace: federation-system
+spec:
+  selector:
+    app: opa
+  ports:
+  - name: http
+    protocol: TCP
+    port: 8181
+    targetPort: 8181