[train][docs] update docstrings/quickstarts to work when `use_gpu=True`#31692

Merged

amogkam merged 4 commits intoray-project:masterfrom matthewdeng:train-quickstart-gpu

Jan 26, 2023

+43-27

Commits on Jan 16, 2023

Commits on Jan 17, 2023

Merge branch 'master' of github.com:ray-project/ray into train-quickstart-gpu
matthewdeng
committed

Commits on Jan 18, 2023

Merge branch 'master' of github.com:ray-project/ray into train-quickstart-gpu
matthewdeng
committed