Add precision tests for CUDA half linspace+logspace (#31962)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31962
I added precision tests for CUDA half, float, and double.
The precision for CUDA half seems bad, but I checked the numbers against
previous versions of pytorch. The output of CUDA Half linspace+logspace
are exactly the same when compared with 1.2.0.
Test Plan: - Run CI
Differential Revision: D19320182
Pulled By: zou3519
fbshipit-source-id: 38d3d4dea2807875ed0b0ec2b93b19c10a289988
