Abstract cuda calls made from `torch_python` (#42251)
Summary:
* Make c10::cuda functions regular non-inlined functions
* Add driver_version() and device_synchronize() functions
With this change I don't see anymore direct calls to CUDA API when look at Modules.cpp.obj
FYI malfet
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42251
Reviewed By: malfet
Differential Revision: D22826505
Pulled By: ziab
fbshipit-source-id: 8dc2f3e209d3710e2ce78411982a10e8c727573c
