Preparation step to remove the subtype relationship between funcref and anyref.

Bug: v8:7748
Change-Id: Ic2d3467addff16dc0df466234cb7ce6e573ba666
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3797829
Auto-Submit: Matthias Liedtke <mliedtke@chromium.org>
Commit-Queue: Matthias Liedtke <mliedtke@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82111}