The frozenness / sealednes is not yet serialized & deserialized, but
this allows prototyping web snap in contexts where frozen / sealed
elements occur.

Bug: v8:11525, v8:12820
Change-Id: I8fb788bd3d1a1ec3e6b47610c69230cc900033b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3652779
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80630}