Consolidate YAML files [part-12] (#9364)

* Consolidate YAML files [part-12]

Relocate YAML files referenced by the accessing application topic
and the rest of cluster administration.

* Adjust json shortcodes.

content/en/examples/admin/dns/busybox.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: busybox
+  namespace: default
+spec:
+  containers:
+  - name: busybox
+    image: busybox
+    command:
+      - sleep
+      - "3600"
+    imagePullPolicy: IfNotPresent
+  restartPolicy: Always