test(packer): make image builder simplier.

tests/cloud-init/ubuntu24-desktop.user-data.yml

@@ -20,18 +20,19 @@ package_update: true
 package_upgrade: true
 package_reboot_if_required: false
 packages:
-  - ubuntu-desktop
-  - linux-generic-hwe-24.04
-  - qemu-guest-agent
-  - spice-vdagent
-  - terminator
   - apparmor-profiles
   - build-essential
   - config-package-dev
   - debhelper
   - devscripts
   - golang-go
+  - linux-generic-hwe-24.04
+  - qemu-guest-agent
   - rsync
+  - spice-vdagent
+  - terminator
+  - ubuntu-desktop
+  - vim
 
 snap:
   commands: