stack manage status should print volume info

[dboreham]

It would be useful to print information about stack volumes, particularly in the k8s case. Info exists like:

$ kubectl --kubeconfig=./test19-k3s.yml --namespace stack-9aaaf7e199d5b254 describe pv pvc-fa5a690f-3fa0-4afe-a992-bc19694aa746
Name:              pvc-fa5a690f-3fa0-4afe-a992-bc19694aa746
Labels:            <none>
Annotations:       local.path.provisioner/selected-node: test19
                   pv.kubernetes.io/provisioned-by: rancher.io/local-path
Finalizers:        [kubernetes.io/pv-protection]
StorageClass:      local-path
Status:            Bound
Claim:             stack-9aaaf7e199d5b254/db-data
Reclaim Policy:    Delete
Access Modes:      RWO
VolumeMode:        Filesystem
Capacity:          2G
Node Affinity:
  Required Terms:
    Term 0:        kubernetes.io/hostname in [test19]
Message:
Source:
    Type:  LocalVolume (a persistent volume backed by local storage on a node)
    Path:  /var/lib/rancher/k3s/storage/pvc-fa5a690f-3fa0-4afe-a992-bc19694aa746_stack-9aaaf7e199d5b254_db-data
Events:    <none>