build two different VM images

build two different VM images

For Proxmox we need to include the shell script and provide a qcow2 image (we
changed the image size to be 16G for x86_64, so we can't use a raw image).
For VirtualBox / VMware / etc we provide a vmdk image.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>