The new PagedNewSpace composes a PagedSpaceBase subclass
(PagedSpaceForNewSpace) to avoid a diamond inheritance since both
PagedSpaceBase and NewSpace inherit from SpaceWithLinearArea.
Both use the same LinearAllocationArea, LinearAreaOriginalData, and
AllocationCounter, but use_lab_ remained a field of SpaceWithLinearArea.
As a result, disabling inline allocations for new space only updated one
of the use_lab_ instances (the one in PagedNewSpace) while allocations
were using the other.
Moving this field to LinearAllocationArea lets both use the same field
and keep in sync.

Bug: v8:12612
Change-Id: I47eccc6444040efc3a3e5d93f6015fd2bdb611b1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3820065Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82315}