There was a DCHECK to ensure tests don't miss enabling either bytecode
or baseline code flushing along with stress-flush-code. Fuzzers use
different combination of flags so there we should allow
stress-flush-code without bytecode / baseline code flushing.

Bug: chromium:1236614,v8:11947
Change-Id: I86190b6336015e37288cffffc05de2fa21f496ad
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3074462
Commit-Queue: Mythri Alle <mythria@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Auto-Submit: Mythri Alle <mythria@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76115}