Add codenew shortcode to configure-pod-configmap task file and sanitize the example files (#13078)

content/en/examples/pods/pod-configmap-env-var-valueFrom.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: dapi-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: k8s.gcr.io/busybox
+      command: [ "/bin/sh", "-c", "echo $(SPECIAL_LEVEL_KEY) $(SPECIAL_TYPE_KEY)" ]
+      env:
+        - name: SPECIAL_LEVEL_KEY
+          valueFrom:
+            configMapKeyRef:
+              name: special-config
+              key: SPECIAL_LEVEL
+        - name: SPECIAL_TYPE_KEY
+          valueFrom:
+            configMapKeyRef:
+              name: special-config
+              key: SPECIAL_TYPE
+  restartPolicy: Never

content/en/examples/pods/pod-configmap-envFrom.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: dapi-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: k8s.gcr.io/busybox
+      command: [ "/bin/sh", "-c", "env" ]
+      envFrom:
+      - configMapRef:
+          name: special-config
+  restartPolicy: Never

content/en/examples/pods/pod-configmap-volume-specific-key.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: dapi-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: k8s.gcr.io/busybox
+      command: [ "/bin/sh","-c","cat /etc/config/keys" ]
+      volumeMounts:
+      - name: config-volume
+        mountPath: /etc/config
+  volumes:
+    - name: config-volume
+      configMap:
+        name: special-config
+        items:
+        - key: special.level
+          path: keys
+  restartPolicy: Never

content/en/examples/pods/pod-configmap-volume.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: dapi-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: k8s.gcr.io/busybox
+      command: [ "/bin/sh", "-c", "ls /etc/config/" ]
+      volumeMounts:
+      - name: config-volume
+        mountPath: /etc/config
+  volumes:
+    - name: config-volume
+      configMap:
+        # Provide the name of the ConfigMap containing the files you want
+        # to add to the container
+        name: special-config
+  restartPolicy: Never

content/en/examples/pods/pod-multiple-configmap-env-variable.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: dapi-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: k8s.gcr.io/busybox
+      command: [ "/bin/sh", "-c", "env" ]
+      env:
+        - name: SPECIAL_LEVEL_KEY
+          valueFrom:
+            configMapKeyRef:
+              name: special-config
+              key: special.how
+        - name: LOG_LEVEL
+          valueFrom:
+            configMapKeyRef:
+              name: env-config
+              key: log_level
+  restartPolicy: Never

content/en/examples/pods/pod-single-configmap-env-variable.yaml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: dapi-test-pod
+spec:
+  containers:
+    - name: test-container
+      image: k8s.gcr.io/busybox
+      command: [ "/bin/sh", "-c", "env" ]
+      env:
+        # Define the environment variable
+        - name: SPECIAL_LEVEL_KEY
+          valueFrom:
+            configMapKeyRef:
+              # The ConfigMap containing the value you want to assign to SPECIAL_LEVEL_KEY
+              name: special-config
+              # Specify the key associated with the value
+              key: special.how
+  restartPolicy: Never