Consolidate YAML files [part-8] (#9347)

* Consolidate YAML files [part-8]

This PR exacts the YAML files referenced from the following subdirs:

- docs/concepts/workloads
- docs/concepts/configuration
- docs/concepts/policy

The following problems are fixed:

- docs/concepts/workloads/controllers/ doesnt have a 'cronjob.yaml for
  test
- the exactly same `pod.yaml` was used in both the task/config-pod-container
  topic and the concepts/configuration topics.

* Update examples_test.go

* Add missing yaml file.

content/en/docs/concepts/workloads/controllers/deployment.md

@@ -40,7 +40,7 @@ The following are typical use cases for Deployments:
 
 The following is an example of a Deployment. It creates a ReplicaSet to bring up three `nginx` Pods:
 
-{{< code file="nginx-deployment.yaml" >}}
+{{< codenew file="controllers/nginx-deployment.yaml" >}}
 
 In this example:
 
@@ -71,7 +71,7 @@ The `template` field contains the following instructions:
 To create this Deployment, run the following command:
 
 ```shell
-kubectl create -f  https://raw.githubusercontent.com/kubernetes/website/master/content/en/docs/concepts/workloads/controllers/nginx-deployment.yaml
+kubectl create -f  https://k8s.io/examples/controllers/nginx-deployment.yaml
 ```
 
 {{< note >}}
@@ -417,7 +417,7 @@ First, check the revisions of this deployment:
 $ kubectl rollout history deployment/nginx-deployment
 deployments "nginx-deployment"
 REVISION    CHANGE-CAUSE
-1           kubectl create -f docs/user-guide/nginx-deployment.yaml --record
+1           kubectl create -f https://k8s.io/examples/controllers/nginx-deployment.yaml --record
 2           kubectl set image deployment/nginx-deployment nginx=nginx:1.9.1
 3           kubectl set image deployment/nginx-deployment nginx=nginx:1.91
 ```