tests(packer): cleanup cloud init files.

tests/packer/init/debian-gnome.user-data.yml

@@ -37,15 +37,21 @@ runcmd:
   - apt-get install -y -t bookworm-backports golang-go
 
 write_files:
-
+  # Add backports repository
   - path: /etc/apt/sources.list
     append: true
     content: deb http://deb.debian.org/debian bookworm-backports main contrib non-free
 
+  # Setup shared directory
+  - path: /etc/fstab
+    append: true
+    content: |
+      0a31bc478ef8e2461a4b1cc10a24cc4 /home/user/Projects/apparmor.d  virtiofs defaults  0  1
+
   # Network configuration
   - path: /etc/systemd/network/20-wired.network
-    owner: 'root:root'
-    permissions: '0644'
+    owner: "root:root"
+    permissions: "0644"
     content: |
       [Match]
       Name=en*