catch and propagate warnings for JIT ScriptMethods (#33010)
Summary:
We align it with ScriptFunctions by using the HANDLE_TH_ERRORS/END_HANDLE_TH_ERRORS_PYBIND macros.
Fixes https://github.com/pytorch/pytorch/issues/24155 or https://github.com/pytorch/pytorch/issues/24828 ?
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33010
Differential Revision: D20053585
Pulled By: suo
fbshipit-source-id: c8876b54069285ba9638bb2328fd8738b59c396d
