* Publish test artifacts to AzDO

* Disable two flaky UAP tests

* Remove leftover buildconfiguration for netfx

* Disable flaky printer test

* Disable flaky PipeWriter test


Commit migrated from https://github.com/dotnet/corefx/commit/75a54c95e2d31370bf8b5024a5b68b3e83cefb2e