code clean of old code from network modules updates (#21469)

* removes unused code
* removes module_utils/local.py
* removes plugins/action/network.py
* removes action_handler from connection plugins
* removes code to use action_handler in task_executor
* updates action plugins to subclass from normal

lib/ansible/plugins/connection/network_cli.py

@@ -42,7 +42,6 @@ class Connection(_Connection):
 
     transport = 'network_cli'
     has_pipelining = False
-    action_handler = 'network'
 
     def __init__(self, play_context, new_stdin, *args, **kwargs):
         super(Connection, self).__init__(play_context, new_stdin, *args, **kwargs)