[RFE] Add support for Windows virtio-scsi / vioscsi

[lukts30]

As documented virt-v2v currently only supports virtio-blk (viostor.sys).

Check that you are presenting a virtio-blk interface (not virtio-scsi and not ide) to the guest.
https://libguestfs.org/virt-v2v.1.html#boot-failure:-0x0000007b

virt-v2v/convert/windows_virtio.ml

Line 61 in 315c016

let filenames = ["virtio_blk"; "vrtioblk"; "viostor"] in

This can cause problems in environments where only virtio-scsi is supported.
Such environments are for example Hetzner Cloud and LXD VMs which are opinionated qemu-based VMs that exclusively use UEFI and only virtio devices (restricted to only virtio-scsi type disks).