Objects might be in a partially initialized state during deserialization
which makes collecting gc-stats tricky.

Bug: v8:12678
Change-Id: I154328adda432bf8e3588c96455c1bd8d527ef43
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3635722Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80446}