test: reduce flakiness in test-heapdump-http2

By the time the response event is emitted on the client's side, the file may have already been fully piped and the stream pipe may have been destroyed, so the test should not look for the stream pipe in the snapshot. PR-URL: #58148 Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: joyeecheung

test/pummel/test-heapdump-http2.js

@@ -56,14 +56,11 @@ server.listen(0, () => {
  ],
  },
  ], { loose: true });
- // `Node / StreamPipe` (C++) -> StreamPipe (JS)
- state.validateSnapshotNodes('Node / StreamPipe', [
- {
- children: [
- { node_name: 'StreamPipe', edge_name: 'native_to_javascript' },
- ],
- },
- ]);
+
+ // We don't necessarily have Node / StreamPipe here because by the time the
+ // response event is emitted, the file may have already been fully piped here
+ // and the stream pipe may have been destroyed.
+
  // `Node / Http2Session` (C++) -> Http2Session (JS)
  state.validateSnapshotNodes('Node / Http2Session', [
  {