We forgot to add statistic reporting for off-thread finalization -- this
needs to be done during the main-thread fix-ups since it can call
embedder callbacks.

Change-Id: I3959a1512166cbdea028799c771f733a6c8a6163
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3217198
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77358}