[PhpUnitBridge] Fix tests

Author: nicolas-grekas

Tests/phpt/autoload.php

@@ -13,6 +13,7 @@
 
 $_SERVER['APP_RUNTIME_OPTIONS'] ??= [];
 $_SERVER['APP_RUNTIME_OPTIONS'] += [
+ 'error_handler' => false,
  'project_dir' => __DIR__,
 ] + ($_SERVER['APP_RUNTIME_OPTIONS'] ?? []);