Slots don't need to be invalidated in the object. The object is trimmed
to its supertype, so all possibly recorded slots remain valid.

Bug: v8:12578, chromium:1316289
Change-Id: I859b3ec843a2c2c9863cdb3bbc1c3158364aaa5b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3622917Reviewed-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@{#80333}