Update pybind to 2.6.0 (#46415)
Summary:
Preserve PYBIND11 (https://github.com/pytorch/pytorch/commit/63ce3fbde85672e112411ad731839e6db3c15c08) configuration options in `torch._C._PYBIND11 (https://github.com/pytorch/pytorch/commit/63ce3fbde85672e112411ad731839e6db3c15c08)_COMPILER_TYPE` and use them when building extensions
Also, use f-strings in `torch.utils.cpp_extension`
"Fixes" https://github.com/pytorch/pytorch/issues/46367
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46415
Reviewed By: VitalyFedyunin
Differential Revision: D24605949
Pulled By: malfet
fbshipit-source-id: 87340f2ed5308266a46ef8f0317316227dab9d4d
