The installation is now using cloud-init config instead of preseed files
(see https://ubuntu.com/server/docs/install/autoinstall).

For now, it's not possible to have different file names than "user-data"
and "meta-data" and the hostname is hardcoded in "user-data" so it won't
work for Ubuntu 24.04 (see
https://cloudinit.readthedocs.io/en/latest/topics/datasources/nocloud.html).

So keep everything in the same file

For info, this is the command used:

for f in *.json; do packer fix -validate $f > $f.fix || echo "$f FAILED" ; mv $f.fix $f ; done

TODO: we should make sure the logs are properly uploaded before exiting

fixup of b68b3f17

The VM will use the DNS server coming from qemu-kvm (see
https://wiki.qemu.org/Documentation/Networking#User_Networking_.28SLIRP.29)
so it will actually use the DNS from the host machine.

fixup of b68b3f17

fixup of 0619932c (keep using insecure
http repository for debian 8, 9 and 10)

both playbooks need to run frequently on ORS which caused conflicts

Printing the string "Build successful, connect to:" in the logs is the
success flag when running Test Suites.