This changes PrepareFunctionForOptimization to have the same checks
as OptimizeFunctionOnNextCall, as otherwise fuzzing runs into
the DCHECK with a bad number of arguments.

Bug: chromium:1094866
Change-Id: Ief7d428a12139c47a74607d39792276a2eae4ebf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2250255Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68410}