Add playbooks to detect issues with persistent volumes and send a message

[aantn]

Motivation Lots of people have issues with persistent volumes. We should add detections for these and recommend fixes.

Example issues

• https://stackoverflow.com/questions/52668938/pod-has-unbound-persistentvolumeclaims/52669115#52669115
• https://stackoverflow.com/questions/51946393/kubernetes-pod-warning-1-nodes-had-volume-node-affinity-conflict/55514852#55514852