Downloadable examples for “Run applications” section (#14147)

* Move examples ahead of commands that use them

In support of https://github.com/kubernetes/website/issues/12740

The aim is to adopt a consistent style around providing downloadable
examples for use with kubectl, etc.

* Tweak wording for stateful app pod example

* Adopt formatting conventions for code blocks

* Move ReplicationController sample YAML to examples

In aid of https://github.com/kubernetes/website/issues/12740

* Move PodDisruptionBudget sample YAML to examples

In aid of https://github.com/kubernetes/website/issues/12740

* Update test schema for new examples

* Use Unicode ellipsis in example

Aim here is to make the elision more obvious

content/en/docs/tasks/run-application/run-replicated-stateful-application.md

@@ -59,12 +59,12 @@ and a StatefulSet.
 
 Create the ConfigMap from the following YAML configuration file:
 
+{{< codenew file="application/mysql/mysql-configmap.yaml" >}}
+
 ```shell
 kubectl apply -f https://k8s.io/examples/application/mysql/mysql-configmap.yaml
 ```
 
-{{< codenew file="application/mysql/mysql-configmap.yaml" >}}
-
 This ConfigMap provides `my.cnf` overrides that let you independently control
 configuration on the MySQL master and slaves.
 In this case, you want the master to be able to serve replication logs to slaves
@@ -79,12 +79,12 @@ based on information provided by the StatefulSet controller.
 
 Create the Services from the following YAML configuration file:
 
+{{< codenew file="application/mysql/mysql-services.yaml" >}}
+
 ```shell
 kubectl apply -f https://k8s.io/examples/application/mysql/mysql-services.yaml
 ```
 
-{{< codenew file="application/mysql/mysql-services.yaml" >}}
-
 The Headless Service provides a home for the DNS entries that the StatefulSet
 controller creates for each Pod that's part of the set.
 Because the Headless Service is named `mysql`, the Pods are accessible by
@@ -105,12 +105,12 @@ writes.
 
 Finally, create the StatefulSet from the following YAML configuration file:
 
+{{< codenew file="application/mysql/mysql-statefulset.yaml" >}}
+
 ```shell
 kubectl apply -f https://k8s.io/examples/application/mysql/mysql-statefulset.yaml
 ```
 
-{{< codenew file="application/mysql/mysql-statefulset.yaml" >}}
-
 You can watch the startup progress by running:
 
 ```shell
@@ -141,8 +141,8 @@ ordinal index.
 It waits until each Pod reports being Ready before starting the next one.
 
 In addition, the controller assigns each Pod a unique, stable name of the form
-`<statefulset-name>-<ordinal-index>`.
-In this case, that results in Pods named `mysql-0`, `mysql-1`, and `mysql-2`.
+`<statefulset-name>-<ordinal-index>`, which results in Pods named `mysql-0`,
+`mysql-1`, and `mysql-2`.
 
 The Pod template in the above StatefulSet manifest takes advantage of these
 properties to perform orderly startup of MySQL replication.