nixosTests.yabar: migrate to runTest

Part Of #386873

nixos/tests/all-tests.nix

···
   xss-lock = handleTest ./xss-lock.nix {};
   xterm = handleTest ./xterm.nix {};
   xxh = handleTest ./xxh.nix {};
-  yabar = handleTest ./yabar.nix {};
+  yabar = runTest ./yabar.nix;
   ydotool = handleTest ./ydotool.nix {};
   yggdrasil = runTest ./yggdrasil.nix;
   your_spotify = runTest ./your_spotify.nix;

nixos/tests/yabar.nix

···
-import ./make-test-python.nix (
-  { pkgs, lib, ... }:
-  {
-    name = "yabar";
-    meta.maintainers = [ ];
+{
+  name = "yabar";
+  meta.maintainers = [ ];
 
-    nodes.machine = {
-      imports = [
-        ./common/x11.nix
-        ./common/user-account.nix
-      ];
+  nodes.machine = {
+    imports = [
+      ./common/x11.nix
+      ./common/user-account.nix
+    ];
 
-      test-support.displayManager.auto.user = "bob";
+    test-support.displayManager.auto.user = "bob";
 
-      programs.yabar.enable = true;
-      programs.yabar.bars = {
-        top.indicators.date.exec = "YABAR_DATE";
-      };
+    programs.yabar.enable = true;
+    programs.yabar.bars = {
+      top.indicators.date.exec = "YABAR_DATE";
     };
+  };
 
-    testScript = ''
-      machine.start()
-      machine.wait_for_x()
+  testScript = ''
+    machine.start()
+    machine.wait_for_x()
 
-      # confirm proper startup
-      machine.wait_for_unit("yabar.service", "bob")
-      machine.sleep(10)
-      machine.wait_for_unit("yabar.service", "bob")
+    # confirm proper startup
+    machine.wait_for_unit("yabar.service", "bob")
+    machine.sleep(10)
+    machine.wait_for_unit("yabar.service", "bob")
 
-      machine.screenshot("top_bar")
-    '';
-  }
-)
+    machine.screenshot("top_bar")
+  '';
+}