This adds a d8 flag --simulate-errors, which on shutdown will cause
certain errors. This enables testing the reliability of sanitizers.

This will cause a fatal error, a dcheck (if available) or a
violation that can be detected with one of the following sanitizers:
ASAN, UBSAN, MSAN, CFI.

The same flag used in differential fuzzing will cause an error
subsumed with the error state "fake_difference".

Bug: chromium:1152412
Change-Id: I4b36c6fe716797004d634263617d22ca67b05600
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2554999
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71430}