apparmor-ofono: Fix script call

Replace macro_ostree_preconditions by install entry to run on both APT and
OSTree images.
Command should not start by `$`

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

test-cases/apparmor-ofono.yaml

@@ -15,10 +15,6 @@ metadata:
   description: "Test that AppArmor profiles provided in ofono package work
                 without unexpected auditd log entries."
 
-  macro_ostree_preconditions:
-    reponame: ofono
-    branch: apertis/v2023dev1
-  
   expected:
     - "A list of executed test with related result (as pass/fail/skip) will be
        shown on console, similar to the following:"
@@ -35,12 +31,17 @@ metadata:
     - "The results of the tests printed to the standard output are enough to
        determine whether they passed or fail."
 
+install:
+  git-repos:
+    - url: https://gitlab.apertis.org/tests/ofono.git
+      branch: 'apertis/v2023dev1'
+
 run:
   steps:
     - "# Enter test directory:"
     - cd ofono
-    - "Execute the following command:"
-    - $ sudo ./run-test.sh
+    - "# Execute the following command:"
+    - sudo ./run-test.sh
 
 parse:
   pattern: ^(?P<test_case_id>[\w\-\.]+):\s(?P<result>PASS|pass|FAIL|fail|SKIP|skip|UNKNOWN|unknown)$