The "DumpAsyncTaskStacksStateForTest" method just prints three counts,
which is not helpful for the fuzzer and can create unwanted output
during fuzzing.

R=szuend@chromium.org

Bug: chromium:1142437
Change-Id: I0192b3bf7d431ccf4938e6fc7a70f59ce43047a9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2778272Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73595}