We can create a new macro to skip the xxxData classes and read directly
from the heap.

Bug: v8:7790
Change-Id: I8de9ba0aee78c74d4c3113eb6bc4870a314de552
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2362687
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69471}