Numfuzz runs our tests without the --testing-d8-test-runner flag.

Bug: v8:12068
Change-Id: I8915a3e13c918009b8dd90fa05f050a89a484883
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3085279
Commit-Queue: Georg Neis <neis@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76206}