Previously we do not tier down from baseline to interpreter, which
breaks per-bytecode side effect checks (to check whether e.g. we are
mutating a temporary object, which is not considered a side effect).

R=leszeks@chromium.org

Bug: chromium:1233401
Change-Id: Ie08b5352aa4c124421b4c9abce18326938bbc822
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3056981Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75963}