Consolidate YAML files [part-10] (#9362)

* Consolidate YAML files [part-10]

This PR relocates the YAML files used by the pod configuration topic.

* Update examples_test.go

* Update examples_test.go

* Update examples_test.go

* Update examples_test.go

* Update examples_test.go

content/en/examples/pods/security/security-context-4.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: security-context-demo-4
+spec:
+  containers:
+  - name: sec-ctx-4
+    image: gcr.io/google-samples/node-hello:1.0
+    securityContext:
+      capabilities:
+        add: ["NET_ADMIN", "SYS_TIME"]