It does a direct access iff the FLAG_turbo_direct_heap_access is
enabled. Otherwise, it uses the Data classes as it did before.

Bug: v8:7790
Change-Id: I4f42e5734fdb2c91dbe9ef08869aec621c9d04c3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2382311
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69737}