Make Windows CUDA-11 tests master only (#43234)
Summary:
According to the correlation analysis, CUDA-10.1 vs CUDA-11 test failures are quite dependent on each other
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43234
Reviewed By: ezyang, seemethere
Differential Revision: D23204289
Pulled By: malfet
fbshipit-source-id: c53c5f87e55f2dabbb6735a0566c314c204ebc69
