Added publishing of test results and minor fixes to Az DevOps Build Logic (#58436)
Summary:
This PR adds the ability to publish the xml test data of custom PyTorch PR tests. This PR also adds a few fixes to the custom PyTorch PR tests logic.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58436
Reviewed By: seemethere, mruberry
Differential Revision: D28512958
Pulled By: malfet
fbshipit-source-id: d3a1a251d3d126c923d5f733dccfb31a4b701b7e
