agl-compositor: Update test case based in new defaults

After the rebase on top of Bullseye and dropping the old framework
agl-compositor is the default compositor for Apertis target images,
so adjust the test case accordingly.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

test-cases/agl-compositor.yaml

@@ -27,18 +27,14 @@ metadata:
     - "@agl-compositor-pavucontrol-screenshot.png"
 run:
   steps:
-    - "Install agl-compositor package"
-    - $ sudo apt-get install agl-compositor
-    - "Configure user-session-launcher to start agl-compositor"
-    - $ sudo sed -i 's@^Exec=.*@Exec=/usr/bin/agl-compositor@' /etc/xdg/user-session-launcher/session.launcher
-    - "Reboot the machine"
-    - $ sudo reboot
     - "Verify that a desktop shows in screen"
     - "Click the indicator for clock and volume in the bottom left to display a popup with additional information"
     - "Click the launcher button in the top left to display the available apps"
     - "Verify that a list of applications is shown"
     - "Enable Development repositories"
     - $ sudo apertis-dev
+    - "Install gnome-menus"
+    - $ sudo apt install gnome-menus
     - "Install pavucontrol"
     - $ sudo apt install pavucontrol
     - "Click on launcher button in the top left to display the installed apps"