We do not need to park/unpark when we can acquire the lock without
blocking.

Bug: v8:10315, chromium:1218318
Change-Id: I7909936531ffe83087182d50e759113a9305fbcf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2953287
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75097}