IM::Finalize() was merely finishing marking through the incremental
marking in the atomic pause. Avoid the Hurry() call since the marking
worklists would anyways be drained with parallel marking.

Bug: v8:12775
Change-Id: Ice72a8bb5f900368eadec7f62bf18e03d568454b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3574547Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79831}