Configure KVM guest to have .iso mounted as a cdrom

This was a pain in the arse.

So ensure that the xml file for the host includes the following.

<disk type=’file’ device=’cdrom’>
<driver name=’qemu’ type=’raw' cache=’none’/>
<source file=’/var/lib/libvirt/images/my-cdrom.iso’/>
<target dev=’sda’ bus=’sata’/>
<readonly/>
<address type=’drive’ controller=’0' bus=’0' target=’0' unit=’0'/>
</disk>

and then run the command from the host to mount

sudo virsh attach-disk vm-wshark0 /var/lib/libvirt/images/debian-12.5.0-amd64-STICK16GB-1.iso sda --type cdrom