Insert TypeGuard nodes for the result of br_on_non_null and the Forward
decoder interface function.
Also, add debug checks when inlining to check real vs. formal argument
types, because that is where the bug manifested.

Bug: v8:7748
Change-Id: I9bd8415a1f10c22ff1cabaa3949749b9495225d1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3695588
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81052}