Revert "Add tensor post accumulate grad hook API (#107063)"
This reverts commit 3f655277d44909e0770e77e1b4fe1c9b0f39d7b9.
Reverted https://github.com/pytorch/pytorch/pull/107063 on behalf of https://github.com/ZainRizvi due to Diff train weirdness. Need to temporarily revert this PR and will right land it soon afterwards ([comment](https://github.com/pytorch/pytorch/pull/107063#issuecomment-1690799057))
