Make ready for split-controller testing in ansible-core (#3345) (#3413)

* Accept context/ in aliases.

* Mark ansible_galaxy_install test as context/controller.

* Fix interfaces_file test.

ci_complete

* Install pyone dependency.

ci_complete

(cherry picked from commit 98d071f61e)

tests/sanity/extra/aliases.py

@@ -41,6 +41,8 @@ def main():
                     continue
                 if line.startswith('cloud/'):
                     continue
+                if line.startswith('context/'):
+                    continue
                 if line in ('unsupported', 'disabled', 'hidden'):
                     skip = True
                 if line in ('destructive', ):