[pure-csi] More human-readable name for dynamically created volumes

[MrRexZ]

With this PR merged, it's possible for the Pure CSI driver to make use of the PVC name & namespace and PV name.
Currently the volumes' generated name are in the following format k8s-{pvc-name}, which makes it more difficult to associate which PVC refers to which volume when looking at a glance.

[sdodsley]

@MrRexZ We would have to wait until that PR gets into a release, probably 1.6.0 when that is out. Then we can investigate

[TJM]

This sounds like it would be really awesome! One of our biggest complaints is that we have to have a magic decoder ring to figure out which volume is causing alerts for the storage team.

[sdodsley]

@TJM @MrRexZ you may want to investigate PSO eXplorer - our Open Source GUI to visualize these connections.
https://github.com/PureStorage-OpenConnect/pso-explorer