nixosTests.zammad: migrate to runTest

Part Of #386873

nixos/tests/all-tests.nix

@@ -1302,7 +1302,7 @@ in {
   ydotool = handleTest ./ydotool.nix {};
   yggdrasil = handleTest ./yggdrasil.nix {};
   your_spotify = handleTest ./your_spotify.nix {};
-  zammad = handleTest ./zammad.nix {};
+  zammad = runTest ./zammad.nix;
   zenohd = runTest ./zenohd.nix;
   zeronet-conservancy = runTest ./zeronet-conservancy.nix;
   zfs = handleTest ./zfs.nix {};

nixos/tests/zammad.nix

@@ -1,7 +1,6 @@
-import ./make-test-python.nix (
-  { lib, pkgs, ... }:
+{ lib, pkgs, ... }:
 
-  {
+{
   name = "zammad";
 
   meta.maintainers = with lib.maintainers; [
@@ -9,9 +8,7 @@ import ./make-test-python.nix (
     netali
   ];
 
-    nodes.machine =
-      { config, ... }:
-      {
+  nodes.machine = {
     virtualisation = {
       memorySize = 2048;
     };
@@ -38,5 +35,4 @@ import ./make-test-python.nix (
             "curl -sSfL http://localhost:3000/ | grep '<title>Zammad Helpdesk</title>'"
         )
   '';
-  }
-)
+}