Velocity and Position command interfaces don't work when Effort command interface exist

[BarisYazici]

When I add the effort command interface to the test_cart_velocity.xacro.urdf example, the velocity example stops working. I modified the example to reproduce the bug https://github.com/BarisYazici/gz_ros2_control/blob/humble/ign_ros2_control_demos/urdf/test_cart_velocity.xacro.urdf.