Add an option for don't using filtered control commands for external input

[ismetatabay]

Checklist

• I've read the contribution guidelines.
• I've searched other issues and no duplicate issues were found.
• I've agreed with the maintainers that I can plan this task.

Description

At the current design of autoware, we cannot use raw external remote controller commands. For example, if we use DS4 joystick in joy_controller package, the raw joystick commands filtered by external_cmd_converter and vehicle_cmd_gate.

Purpose

If we make our vehicle which can be controlled like R/C car, we can want to use raw joystick message input for /control/command/control_cmd. There is no need acceleration map, braking map or filtering

Possible approaches

Add an option for skipping filtering on input external control commands.

Definition of done

Update external_cmd_converter and vehicle_cmd_gate for this purpose