Revert "Move THPStorage definitions out of `torch/csrc/generic` (#78032)"
This reverts commit f0121528364f6023c69f49e69fabc00863a5ef57.
Reverted https://github.com/pytorch/pytorch/pull/78032 on behalf of https://github.com/suo due to This broke windows binary builds, see: https://hud.pytorch.org/pytorch/pytorch/commit/f0121528364f6023c69f49e69fabc00863a5ef57
