nixosTests.lighttpd: migrate to runTest

Part of #386873

nixos/tests/lighttpd.nix

@@ -1,25 +1,23 @@
-import ./make-test-python.nix (
-  { lib, pkgs, ... }:
-  {
-    name = "lighttpd";
-    meta.maintainers = with lib.maintainers; [ bjornfor ];
+{ lib, pkgs, ... }:
+{
+  name = "lighttpd";
+  meta.maintainers = with lib.maintainers; [ bjornfor ];
 
-    nodes = {
-      server = {
-        services.lighttpd.enable = true;
-        services.lighttpd.document-root = pkgs.runCommand "document-root" { } ''
-          mkdir -p "$out"
-          echo "hello nixos test" > "$out/file.txt"
-        '';
-      };
+  nodes = {
+    server = {
+      services.lighttpd.enable = true;
+      services.lighttpd.document-root = pkgs.runCommand "document-root" { } ''
+        mkdir -p "$out"
+        echo "hello nixos test" > "$out/file.txt"
+      '';
     };
+  };
 
-    testScript = ''
-      start_all()
-      server.wait_for_unit("lighttpd.service")
-      res = server.succeed("curl --fail http://localhost/file.txt")
-      assert "hello nixos test" in res, f"bad server response: '{res}'"
-      server.succeed("systemctl reload lighttpd")
-    '';
-  }
-)
+  testScript = ''
+    start_all()
+    server.wait_for_unit("lighttpd.service")
+    res = server.succeed("curl --fail http://localhost/file.txt")
+    assert "hello nixos test" in res, f"bad server response: '{res}'"
+    server.succeed("systemctl reload lighttpd")
+  '';
+}