[LocalPV-ZFS]: e2e test for zfs controller in high availability (HA)

[rohan2794]

This functional experiment scale up the zfs-controller deployment replicas to use it in high availability mode and then verify the zfs-localpv behaviour when one of the replicas go down. This experiment checks the initial number of replicas of zfs-controller deployment and scale it by one if a free node is present which should be able to schedule the pods. Default value for zfs-controller deployment replica is one.

https://github.com/openebs/zfs-localpv/tree/develop/e2e-tests/experiments/functional/zfs-controller-high-availability