Summary:
`c10::AttributeError` is not automatically converted to Python AttributeError, it needs some special macros (e.g. `HANDLE_TH_ERRORS`).
Some Python functions like `hasattr` rely on the type of the throw exception to be correct.
We don't need the fully generality of those macros, so just do a targeted error type conversion here.
Test Plan: added unit test
Differential Revision: D69197217
Pull Request resolved: https://github.com/pytorch/pytorch/pull/146516
Approved by: https://github.com/zdevito