Validate debugger-caused-leak fix in V8

[danfuzz]

Describe the bug

This project ran across the bug described in https://bugs.chromium.org/p/v8/issues/detail?id=13891. As of this writing, It seems to be fixed, in some form, but it's not yet closed in the Chromium issue tracker, nor (obviously) is there a Node release with the fix.

Once there is in fact a Node release, we should verify the fix by undoing the workaround in EventSink.js, and doing heap dumps with a debugger attached.

Environment

• OS: n/a
• Node: not claimed fixed as of 20.0

[danfuzz]

The bug I filed was duped into https://issues.chromium.org/issues/42203677. That bug is listed as still open, but based on the linked test case which runs in your local browser, it looks like the bug is actually fixed. Unclear when, and so also unclear if Node would have picked up the fix yet.

[danfuzz]

I just did a test with Node v22, and it looks like the problem is fixed there. Unfortunately, we can't rely on v22 being available everywhere we want to run, yet, so I'm leaving this issue open for now.