Leader election identity matching does not work if host networked

[gcampbell12]

The volume modifier attempts to run on the same node as the csi-resizer by watching the external-resizer lease and trying to match the holder identity of the lease to the current pod name in cases where the CSI driver pod is host networked this does not work since the resizer sets the identity of it's lease from the sanitized hostname which for host networked pods is the hostname of the underlying node:
https://github.com/kubernetes-csi/csi-lib-utils/blob/master/leaderelection/leader_election.go#L202-L204 / https://github.com/kubernetes-csi/csi-lib-utils/blob/master/leaderelection/leader_election.go#L207-L215

This mismatch of names means you end up deadlocked with no volume modifier running