Improve libuv detection on Windows (#48571)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/48304
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48571
Reviewed By: ejguan
Differential Revision: D25220903
Pulled By: mrshenli
fbshipit-source-id: a485568621c4e289c5439474c2651186bc63c2f0
