bib should not generate vhd image on s390x machine

[chunfuwen]

Vhd aims to support on Vmware vsphere platform only.  And it doesn't support s390x VM guest, so bib should not generate vhd image on s390x machine.

sudo podman run --rm -it --privileged --pull=newer --security-opt label=type:unconfined_t -v /var/lib/libvirt/images/output:/output -v /var/lib/libvirt/images/config.json:/config.json   -v /var/lib/libvirt/images/auth.json:/run/containers/0/auth.json  quay.io/centos-bootc/bootc-image-builder:latest  --type vhd --tls-verify=true  --config /config.json  quay.io/centos-bootc/centos-bootc:stream10  --rootfs xfs '

....

d2bd91441d0ed6d459d6afaeb2420ac03fff7c0b124b35bee5d644b35218644e
2024-10-22 04:39:35,825 avocado.utils.process process          L0473 DEBUG| [stdout] Build complete!
2024-10-22 04:39:35,825 avocado.utils.process process          L0473 DEBUG| [stdout] Results saved in
2024-10-22 04:39:35,826 avocado.utils.process process          L0473 DEBUG| [stdout] .