Add pytest-azurepipelines
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

It seems this plugin does not need any configuration Looks like the package is not built for Python 3.7, so we'll have to wait or implement this manually. May be we can report it upstream.

What would be nice is to make a test fail in this PR, so we can see if the package is generating the expected result.

Also, if you can please reference the issue in the PR description, that would be great. duplicated by https://github.com/pandas-dev/pandas/pull/26620