Make Store::setTimeout take milliseconds (#16278)
Summary:
This is particularly useful when using a c10d::Store from tests.
cc jgehring
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16278
Reviewed By: janewangfb
Differential Revision: D13866271
Pulled By: pietern
fbshipit-source-id: c8670b5f4ebd5cd009f2cabbe46cc17a9237d775
