Revert "[custom_op] Change the python type that maps to ListType in schema (#101190)"
This reverts commit de6470e28e31c24862950ca381d32f910a168dd0.
Reverted https://github.com/pytorch/pytorch/pull/101190 on behalf of https://github.com/jeanschmidt due to preventing the revert of #100980 ([comment](https://github.com/pytorch/pytorch/pull/101190#issuecomment-1548332644))