wrap_pybind_function: support member function pointers (#88932)
This updates `wrap_pybind_function` to use `invoke` and adds the
`invoke_traits` object which is analogous to `function_traits` but
for member functions it includes the class as an explicit argument.
To test this is working properly, I've also applied it to the
`CUDAGraph` binding code.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88932
Approved by: https://github.com/albanD
