We should not allow runtime functions that perform extra checks in
differential fuzzing, as there we ignore crashes and dchecks entirely.

Furthermore, this change whitelists some runtime functions for getting
more coverage.

Bug: chromium:1044942
Change-Id: Ie5d90bb53bc2d2bacc6635b1dcbe466605b33e12
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2041444
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66205}