Issue #3540646 by andypost, penyaskito: Fix deprecated readdir() without argument for PHP 8.5

    // Expose tests provided by core recipes.

    $base_path = $this->root . '/core/recipes';

    if (@opendir($base_path)) {

      while (($recipe = readdir()) !== FALSE) {

    if ($handle = @opendir($base_path)) {

      while (($recipe = readdir($handle)) !== FALSE) {

        $this->testNamespaces["Drupal\\FunctionalTests\\Recipe\\Core\\$recipe\\"][] = "$base_path/$recipe/tests/src/Functional";

      }

      closedir();

      closedir($handle);

    }

    foreach ($this->testNamespaces as $prefix => $paths) {