[BEE-12428] Adding dynamicPVC for volumes

Author: Dan-Heath

README.md

@@ -276,6 +276,7 @@ Either way it provides access to the following fields:
 * **nodeSelector** The node selector of the pod.
 * **nodeUsageMode** Either `NORMAL` or `EXCLUSIVE`, this controls whether Jenkins only schedules jobs with label expressions matching or use the node as much as possible.
 * **volumes** Volumes that are defined for the pod and are mounted by **ALL** containers.
+  * `dynamicPVC()` : a persistent volume claim managed dynamically. It is deleted at the same time as the pod.
 * **envVars** Environment variables that are applied to **ALL** containers.
     * **envVar** An environment variable whose value is defined inline.
     * **secretEnvVar** An environment variable whose value is derived from a Kubernetes secret.