Store coverage.xml as artifact for windows test jobs (#56179)
Summary:
Currently, coverage stats is getting covered for sharded windows tests. This PR attempts to store the coverage.xml file as an artifact.
I wonder what CircleCI will do when the artifacts don't exist (for nonsharded tests), and if we could conditionally store artifacts.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56179
Reviewed By: samestep
Differential Revision: D27800628
Pulled By: janeyx99
fbshipit-source-id: 919f5696c0d7b4ee0d99969f35797f5be644c364
