This is to make space for new instructions, such as br_on_non_null.

Change-Id: Id631478a1c0da2c20efe81aabe755d5fda841dba
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2897086Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74570}