Consolidate YAML files [part-4] (#9241)

This PR consolidates YAML files used in the
`tasks/debug-application-cluster` subdirectory.

Depends-On: #9236

content/en/examples/application/nginx-with-request.yaml

@@ -0,0 +1,23 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+spec:
+  selector:
+    matchLabels:
+      app: nginx
+  replicas: 2
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx
+        resources:
+          limits:
+            memory: "128Mi"
+            cpu: "500m"
+        ports:
+        - containerPort: 80

content/en/examples/application/shell-demo.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: shell-demo
+spec:
+  volumes:
+  - name: shared-data
+    emptyDir: {}
+  containers:
+  - name: nginx
+    image: nginx
+    volumeMounts:
+    - name: shared-data
+      mountPath: /usr/share/nginx/html