Revert "Replace int64_t with a size type in python_list.h when applicable (#101922)"
This reverts commit 44e7f07ed4ef3ea2f9dc8deb66a779aeb4450b21.
Reverted https://github.com/pytorch/pytorch/pull/101922 on behalf of https://github.com/atalman due to breaks windows nightlies ([comment](https://github.com/pytorch/pytorch/pull/101922#issuecomment-1567240450))
