Comment 5 for bug 1988401

@ThomasBechtold.
 I've tested bionic, focal and jammy with the following procedure:

cat > user-data <<EOF
#cloud-config
ssh_import_id: [chad.smith]
EOF

for series in bionic focal jammy; do
   lxc init ubuntu-daily/$series lp-1988401-$series
   lxc config set lp-1988401-$series cloud-init.user-data="$(cat user-data)"
   lxc config template delete lp-1988401-$series cloud-init-meta.tpl
   lxc config template delete lp-1988401-$series cloud-init-network.tpl
   lxc config template delete lp-1988401-$series cloud-init-user.tpl
   lxc config template delete lp-1988401-$series cloud-init-vendor.tpl
   lxc start lp-1988401-$series
   sleep 5
    lxc exec lp-1988401-$series -- cloud-init status --wait --long
    lxc exec lp-1988401-$series -- cloud-init query userdata
    lxc exec lp-1988401-$series -- cloud-init grep Traceback /var/log/cloud-init.log
done

All tests come up with LXD datasource properly, no Tracebacks and proper userdata being passed through to the instance.