--dump-counters and --dump-counters-nvp are only functional in d8, thus
they should be d8-only flags.

R=mlippautz@chromium.org

Bug: v8:12464
Change-Id: Ie3295990a1b4691ab95f8403ff6d9932543b03cd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3312275Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78247}