This enabled dynamic tiering by default in V8. Chromium overwrites the
default, so this CL by itself has no effect on Chrome users, but a
similar CL will land in the chromium repo.

R=mslekova@chromium.org

Bug: v8:12281
Change-Id: Iaa6d77dc80063f3c4e1d005c371573fc70c698aa
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3568449Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79804}