This reverts commit 12e46091.

Reason for revert: new test fails on GC stress bot:
https://cr-buildbucket.appspot.com/build/8823858142855002833

Original change's description:
> [heap] Support client-to-shared refs in Code objects
>
> Support references from code objects in the client heaps to shared heap objects. Such references are stored in a remembered set during marking, which is later used for updating pointers.
>
> Bug: v8:11708
> Change-Id: I8aeb508ddd14514ca65fa5acf3030dd8c2040168
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3401588
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#78819}

Bug: v8:11708
Change-Id: If8d15a22651f8b1cfca61be21a81f60b43f008a4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3421725
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78821}