This reverts commit adb6276f.

Reason for revert: Broke several blink unit tests, see
https://ci.chromium.org/ui/p/chromium/builders/ci/linux-chromeos-dbg/25255/overview
for an example

Original change's description:
> Reland "cppgc: Enable checks for assignments in prefinalizers"
>
> This is a reland of edcc8ff5
>
> Cause for previous revert was addressed by crbug.com/1241773.
>
> Original change's description:
> > cppgc: Enable checks for assignments in prefinalizers
> >
> > Bug: v8:11749
> > Change-Id: Ic027f732030fb6a2befeffeca9db2eacfd0830a5
> > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3099953
> > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> > Commit-Queue: Omer Katz <omerkatz@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#76370}
>
> Bug: v8:11749
> Change-Id: I57fc138ace002d41e54f7f70250e4d19bc9262b0
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3122153
> Auto-Submit: Omer Katz <omerkatz@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#76553}

Bug: v8:11749
Change-Id: Icc6a3e56d54c22de943b498c2fd6d57f3ef33f96
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3128562
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Fergus Dall <sidereal@google.com>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76558}