[reland] Provide pre-extracted DataPtrs when completing a Future with a Message (#59208)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59208
Reland of https://github.com/pytorch/pytorch/pull/58425
Now that callbacks can provide pre-extracted DataPtrs, let's do so. This will become of crucial importance in the next PR, where some of these futures will become CUDA-aware, and thus they will try to extract DataPtrs on their own, but they would fail to do so here because Message isn't "inspectable".
ghstack-source-id: 130202845
Test Plan: CI
Reviewed By: mrshenli
Differential Revision: D28623888
fbshipit-source-id: 1aa4bde8014870c071685ba8f72d5f3f01f0a512
