Support the `calibration rising` tag in URDF joints

[Tacha-S]

I understand that Dynamixel provides a Homing Offset parameter and that it can be configured through ros2_control GPIO.
However, in some cases—such as when using robot_calibration—the URDF joint calibration rising parameter is also used to perform home-position calibration.

Therefore, I would like to propose the following:

• If a Homing Offset is configured through ros2_control GPIO, that value should take priority.
• If no Homing Offset is set via GPIO and a rising value is specified in the URDF, then the Homing Offset should be overridden using that URDF value.