Shrink life range of worklists and add IsEmpty-CHECKs for them. Also
move some logic into its own method ProcessChunksWithEmptyBuckets.

Bug: chromium:1336158
Change-Id: Ia2f34c824f5b1c5d61391a1a1243a46881040de1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3704511
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81158}