Add LIO or IET iSCSI target compatibility to SCALE so Proxmox "ZFS over ISCSI" can work natively

[BooMShanKerX]

Feature request is here:

Proxmox Storage Plugin API Enhancements for dataset / zvol management

We are trying to build a native storage plugin for Proxmox that uses the API to manage ZFS over ISCSI. Unfortunately several zfs commands are not implemented in the API. This forces us to use ssh+root to execute zfs commands directly on the TrueNAS host. Eg. Creating linked clones requires the renaming of a zvol from vm-<VMID>-disk-0 → base-<VMID>-disk-0. We noticed that the ability to rename a zvol has also been removed from the WebUI, leaving the only option shell commands. Considering the…