investigate: backup secrets to PVC

[DerekRoberts]

Investigate backing up secrets to a PVC. @pbastia has a working example!
bcgov/cas-pipeline#125

[DerekRoberts]

After taking a bit of a deeper dive on this I think we should decline. At least for this template repository. It's a great idea, but I need to find a more appropriate target before devorint further effort.