Add option to set the `disk sector size` for the disk created from imported disk image

Problem/Justification
This is a vital setting and you can set this if you create the Zvol manually.

If this is a VHDX then the disk sector size should be prefilled with that of the disk image.

This will obviously be set in the VM

Impact
You need to be able to define the sector size of the Zvol otherwise physical and logical sector will default to 512.

you can change this afterwards but this is a massive over site.

User Story
n/a