CUDA testing support in proj

[lockshaw]

No description provided.

[lockshaw]

From slack:

proj should be updated so that when someone runs proj test it checks for a GPU, and if a GPU is found it runs the GPU tests, and if the GPU is not found then it throws an error/prints an error message. An additional flag --skip-gpu-tests should be added to proj test that users without a GPU should run in order to not get that error

Also, while Dylan's command is correct, kernels currently does GPU tests in a somewhat outdated way. We're planning to move over to the model @reyna-abhyankar introduced in local-execution, where there are two doctest TEST_SUITEs, one for cuda tests and one for non-cuda tests

Eventually kernels should also be moved over to use this model

Example: https://github.com/reyna-abhyankar/FlexFlow/blob/79ef4c964fa4abebf9813166353ecce230b83c75/lib/local-execution/test/src/test_update_e2e.cc#L13

[chenzhuofu]

Kernels tests was added to proj. You could check here. @lockshaw