Fixes to the controller text model (#17527)

* Fixes to the controller text model

* Change command line args to text type
* Make display replace undecodable bytes with replacement chars.  This
  is only a problem on pyhton3 where surrogates can enter into the msg
  but sys.stdout doesn't know how to handle them.
* Remove a deprecated playbook syntax in unicode.yml

* Fix up run_cmd to change its parameters to byte string at appropriate times.

test/integration/unicode.yml

@@ -32,7 +32,7 @@
         groups: 'ĪīĬĭ'
         ansible_ssh_host: 127.0.0.1
         ansible_connection: local
-      with_items: hostnames
+      with_items: "{{ hostnames }}"
 
     - name: 'A task with unicode extra vars'
       debug: var=extra_var