Fix netconf connection command timeout issue (#58322)

*  ncclient uses same timeout value at the time
   of connection initialisation and waiting response
*  Ansible has connect_timeout to control the waiting
   time during initial connection and `command_timeout`
   to control the wait time for resposne. Hence set the
   ncclient timeout seperately to Ansible command_timeout
   after the connection object is created sucessfully.

lib/ansible/plugins/connection/netconf.py

@@ -321,6 +321,8 @@ class Connection(NetworkConnectionBase):
                 timeout=self.get_option('persistent_connect_timeout'),
                 ssh_config=self._ssh_config
             )
+
+            self._manager._timeout = self.get_option('persistent_command_timeout')
         except SSHUnknownHostError as exc:
             raise AnsibleConnectionFailure(to_native(exc))
         except ImportError as exc: