Expose PVC Name in Metrics

[sidewinder12s]

Is your feature request related to a problem?/Why is this needed

Currently you cannot easily associate EBS Volumes to the PVCs that provision them

/feature

Describe the solution you'd like in detail

Could the PVC name/namespace be attached to CSI Node metrics for each volume? Since instance and volume already are unique it shouldn't increase cardinality.

Describe alternatives you've considered

Haven't looked yet to see if there are other metrics that might let me join on.

Additional context
Add any other context or screenshots about the feature request here.

[ConnorJC3]

We looked into this previously, but discarded it at the time because the only way for us to reliably get that information would be every single node hitting the Kubernetes API to look up PVCs, thus requiring adding new permissions and a network dependency to the NVMe metrics feature.

That said, I'll leave this open as a feature request to reconsider.

/kind feature

[sidewinder12s]

Maybe the controller could keep a cache that the nodes could hit.