Moving ConnectionInformation -> PlayContext

Also making PlayContext a child class of the Playbook Base class,
which gives it access to all of the FieldAttribute code to ensure
field values are correctly typed after post_validation

Fixes #11381

lib/ansible/plugins/callback/__init__.py

@@ -54,7 +54,7 @@ class CallbackBase:
             for warning in res['warnings']:
                 self._display.warning(warning)
 
-    def set_connection_info(self, conn_info):
+    def set_play_context(self, play_context):
         pass
 
     def on_any(self, *args, **kwargs):