Add Azure support to ansible-test. (#28092)

* Initial Azure cloud testing support.
* Add missing Azure requirements.
* Fix test handling of setup and requirements.
* Update Azure cloud plugin.
* Add setup_azure role for integration tests.
* Update minimal Azure integration test sample.

test/runner/lib/core_ci.py

@@ -56,6 +56,7 @@ class AnsibleCoreCI(object):
 
         aws_platforms = (
             'aws',
+            'azure',
             'windows',
             'freebsd',
             'rhel',