mark-compact.cc: Iterate over all new space pages.
heap-layout-tracer.cc: Iterate over the paged new space.

Bug: v8:12612
Change-Id: I4d8dfc48632908a80793a77c211020452c675ecf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3823134Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82365}