nixosTests.nginx-unix-socket: migrate to runTest

Part of #386873

nixos/tests/nginx-unix-socket.nix

@@ -1,31 +1,29 @@
-import ./make-test-python.nix (
-  { pkgs, ... }:
-  let
-    nginxSocketPath = "/var/run/nginx/test.sock";
-  in
-  {
-    name = "nginx-unix-socket";
+{ ... }:
+let
+  nginxSocketPath = "/var/run/nginx/test.sock";
+in
+{
+  name = "nginx-unix-socket";
 
-    nodes = {
-      webserver =
-        { pkgs, lib, ... }:
-        {
-          services.nginx = {
-            enable = true;
-            virtualHosts.localhost = {
-              serverName = "localhost";
-              listen = [ { addr = "unix:${nginxSocketPath}"; } ];
-              locations."/test".return = "200 'foo'";
-            };
+  nodes = {
+    webserver =
+      { pkgs, lib, ... }:
+      {
+        services.nginx = {
+          enable = true;
+          virtualHosts.localhost = {
+            serverName = "localhost";
+            listen = [ { addr = "unix:${nginxSocketPath}"; } ];
+            locations."/test".return = "200 'foo'";
           };
         };
-    };
+      };
+  };
 
-    testScript = ''
-      webserver.wait_for_unit("nginx")
-      webserver.wait_for_open_unix_socket("${nginxSocketPath}")
+  testScript = ''
+    webserver.wait_for_unit("nginx")
+    webserver.wait_for_open_unix_socket("${nginxSocketPath}")
 
-      webserver.succeed("curl --fail --silent --unix-socket '${nginxSocketPath}' http://localhost/test | grep '^foo$'")
-    '';
-  }
-)
+    webserver.succeed("curl --fail --silent --unix-socket '${nginxSocketPath}' http://localhost/test | grep '^foo$'")
+  '';
+}