Description of problem:
Virt-v2v can't convert guest when os is installed on nvme disk via vmx+ssh

Version-Release number of selected component (if applicable):
virt-v2v-2.0.1-1.el9.x86_64
libguestfs-1.48.0-2.el9.x86_64
guestfs-tools-1.48.0-1.el9.x86_64
libvirt-libs-8.1.0-1.el9.x86_64
qemu-img-6.2.0-12.el9.x86_64
nbdkit-server-1.30.1-2.el9.x86_64
libnbd-1.12.2-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Prepare a VMware guest and its os is installed on nvme disk, convert it from VMware via vmx+ssh by v2v
# virt-v2v -i vmx -it ssh ssh://root.75.219/vmfs/volumes/esx6.7-function/esx6.7-rhel8.6-nvme-disk/esx6.7-rhel8.6-nvme-disk.vmx -ip /home/esxpw 
[   0.0] Setting up the source: -i vmx ssh://root.75.219/vmfs/volumes/esx6.7-function/esx6.7-rhel8.6-nvme-disk/esx6.7-rhel8.6-nvme-disk.vmx
(root.75.219) Password: 
[   3.8] Opening the source
[   9.8] Inspecting the source
virt-v2v: error: inspection could not detect the source guest (or physical 
machine).

Assuming that you are running virt-v2v/virt-p2v on a source which is 
supported (and not, for example, a blank disk), then this should not 
happen.

No root device found in this operating system image.

If reporting bugs, run virt-v2v with debugging enabled and include the 
complete output:

  virt-v2v -v -x [...]



Actual results:
As above description

Expected results:
Virt-v2v can convert guest when os is installed on nvme disk via vmx+ssh


Additional info:
Virt-v2v can convert guest when os is installed on nvme disk via ova

# virt-v2v -i ova /home/esx6_7-rhel8.6-nvme-disk -o rhv-upload -of qcow2 -oc https://dell-per740-22.lab.eng.pek2.redhat.com/ovirt-engine/api  -op /home/rhvpasswd  -os nfs_data -b ovirtmgmt  -oo rhv-cafile=/home/ca.pem -oo rhv-verifypeer
[   0.0] Setting up the source: -i ova /home/esx6_7-rhel8.6-nvme-disk
virt-v2v: warning: making OVA directory public readable to work around 
libvirt bug https://bugzilla.redhat.com/1045069
[   1.1] Opening the source
[   5.3] Inspecting the source
[  11.0] Checking for sufficient free disk space in the guest
[  11.0] Converting Red Hat Enterprise Linux 8.6 Beta (Ootpa) to run on KVM
virt-v2v: This guest has virtio drivers installed.
[  96.7] Mapping filesystem data to avoid copying unused and blank areas
[  98.0] Closing the overlay
[  98.3] Assigning disks to buses
[  98.3] Checking if the guest needs BIOS or UEFI to boot
[  98.3] Setting up the destination: -o rhv-upload -oc https://dell-per740-22.lab.eng.pek2.redhat.com/ovirt-engine/api -os nfs_data
[ 117.8] Copying disk 1/1
█ 100% [****************************************]
[ 374.7] Creating output metadata
[ 384.1] Finishing off