ui: guest import: implement 'map-to-sata' checkbox

ui: guest import: implement 'map-to-sata' checkbox

this is useful when wanting to change to virtioscsi for windows vms,
since we cannot have multiple different scsi controllers.

we assume here that all assigned sata disks/cds have a continuous range,
so sata0, sata1, etc. without any holes

with that assumption, we can use the maximum sata index and simply put
the scsi ones after that.

when there are too many disks to map correctly to sata, show a warning
with the disk id that contains a tooltip.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>