Revert "Redo how custom/python_custom methods on TensorImpl work (#84796)
This reverts commit 591b75bf98b92acd4f3d0a1dc934198afeaa6fc1.
Manual revert of https://github.com/pytorch/pytorch/pull/84641
Fixes #ISSUE_NUMBER
Pull Request resolved: https://github.com/pytorch/pytorch/pull/84796
Approved by: https://github.com/izaitsevfb