nixosTests: handleTest -> runTest, batch 1

Reference: https://github.com/NixOS/nixpkgs/issues/386873

nixos/tests/coder.nix

@@ -1,25 +1,23 @@
-import ./make-test-python.nix (
-  { pkgs, ... }:
-  {
-    name = "coder";
-    meta.maintainers = pkgs.coder.meta.maintainers;
+{ pkgs, ... }:
+{
+  name = "coder";
+  meta.maintainers = pkgs.coder.meta.maintainers;
 
-    nodes.machine =
-      { pkgs, ... }:
-      {
-        services.coder = {
-          enable = true;
-          accessUrl = "http://localhost:3000";
-        };
+  nodes.machine =
+    { pkgs, ... }:
+    {
+      services.coder = {
+        enable = true;
+        accessUrl = "http://localhost:3000";
       };
+    };
 
-    testScript = ''
-      machine.start()
-      machine.wait_for_unit("postgresql.service")
-      machine.wait_for_unit("coder.service")
-      machine.wait_for_open_port(3000)
+  testScript = ''
+    machine.start()
+    machine.wait_for_unit("postgresql.service")
+    machine.wait_for_unit("coder.service")
+    machine.wait_for_open_port(3000)
 
-      machine.succeed("curl --fail http://localhost:3000")
-    '';
-  }
-)
+    machine.succeed("curl --fail http://localhost:3000")
+  '';
+}