With PGO, I am hitting typer errors. Instead of just saying
"UNREACHABLE", do print an error message instead, which would previously
have required passing --trace-wasm-typer.

R=manoskouk@chromium.org

Bug: v8:13209
Change-Id: I75498782712b6adfeb1236f6882c49d015f9ef78
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3870920Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82968}