CI: move py38 slow to azure #38429
xref #38429

We're not testing databases on py38 slow currently. Keep the issue open until we figure out what to do with its SQL tests.


thanks @fangchenli very happy to push :-> (as we have this travis deadline ) note that we will likley backport these to 1.2.x @simonjayhawkins marking for 1.2 (but will just bump to actual 1.2.x version) @fangchenli this looks good. ready? ignoring other builds failing on travis. thanks @fangchenli keep em coming! @meeseeksdev backport 1.2.x