[export] Initial deserialization v2 (#102716)
v2 of https://github.com/pytorch/pytorch/pull/102126. mentally stacked on top of https://github.com/pytorch/pytorch/pull/102707
Pull Request resolved: https://github.com/pytorch/pytorch/pull/102716
Approved by: https://github.com/avikchaudhuri, https://github.com/zhxchen17
