Ignore lints in observatory test

Author: bdero

testing/dart/observatory/scene/scene_reload_test.dart

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// ignore_for_file: type=lint
+
 import 'dart:developer' as developer;
 import 'dart:typed_data';
 import 'dart:ui';