build: Start virtual machine w/ cloud-init configuration

cloud-init/user-data.template

@@ -14,6 +14,11 @@ runcmd:
   - apt-get install -y linux-modules-extra-$(uname -r)
   - sysctl -w net.ipv6.conf.all.disable_ipv6=1
   - systemctl enable --now qemu-guest-agent.service
+  - cloud-init clean --logs
+  - truncate -s 0 /etc/hostname /etc/machine-id
+  - rm -f /etc/ssh/ssh_host_* /var/lib/dbus/machine-id
+  - ln -s /etc/machine-id /var/lib/dbus/machine-id
+  - poweroff
 
 disable_root: false
 users: