Rename ONNX util test names (#19153)
Summary:
Rename test cases.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19153
Reviewed By: zrphercule
Differential Revision: D14890095
Pulled By: houseroad
fbshipit-source-id: 37a787398c88d9cc92b411c2355b43200cf1c4b0
