Optimize linux CI build/test matrix (#43240)
Summary:
Make CUDA-10.1 configs build-only, as CUDA-10.1 and CUDA-10.2 test matrix is almost identical, and now, since CUDA-11 is out perhaps it's time to stop testing CUDA-10.1.
Make CUDA-9.2+GCC_5.4 an important (i.e. running on PR) build only config, because of the big overlap between CUDA-9.2-GCC7 and CUDA-9.2-GCC5.4 test coverage.
Make CUDA-11 libtorch tests important rather that CUDA-10.2.
As result of the change, every PR will be built against CUDA-9.2, CUDA-10.2 and CUDA-11 and tested against CUDA-10.2
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43240
Reviewed By: ezyang
Differential Revision: D23205129
Pulled By: malfet
fbshipit-source-id: 70932e8b2167cce9fd621115c8bf24b1c81ed621
