Revert "[Autograd] Use in-place input accumulation fast path for dense Tensors. (#88339)"
This reverts commit 8f66ae413f8c9d7f2418d7f0b9f69d409c455b46.
Reverted https://github.com/pytorch/pytorch/pull/88339 on behalf of https://github.com/mehtanirav due to Internal test failures
