[collect_env] Add candidate paths for nvidia-smi on Windows (#49021)
Summary:
Recently, Nvidia tries to put nvidia-smi under SystemRoot.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49021
Reviewed By: zhangguanheng66
Differential Revision: D25399831
Pulled By: ezyang
fbshipit-source-id: b1ea12452012e0a3fb4703996b6104e7115a8a7f
