CI/TST: Better information about the tests in azure-pipelines
Copying from https://github.com/astropy/astropy/pull/8445#issuecomment-546140223

If you install the newest version of pytest-azurepipelines (1.0.0rc1) https://pypi.org/project/pytest-azurepipelines/1.0.0rc1/ I've switched the output from Junit to Nunit XML as its better supported in Azure Pipelines.
You can then run this Azure plugin https://marketplace.visualstudio.com/items?itemName=AnthonyShaw.vss-pytest and you get an extra tab in the UI with all the information from the Pytest run, including skip reasons, fail reasons, fixtures, versions, parameters.

I guess we want this.