Make configuration parameters for motion constraints

[HussainGynai]

The constants in question are:

robocup-software/soccer/src/soccer/planning/motion_constraints.cpp

Lines 6 to 7 in 38b370a

	ConfigDouble* MotionConstraints::max_acceleration_config;
	ConfigDouble* MotionConstraints::max_speed_config;

We want them to be declared using the new ROS parameters interface. An example of using the parameters interface:
https://github.com/RoboJackets/robocup-software/blob/ros2/soccer/include/rj_vision_filter/params.hpp
https://github.com/RoboJackets/robocup-software/blob/ros2/soccer/src/rj_vision_filter/params.cpp

For the following parameter declaration:

DECLARE_NS_INT64(kVisionFilterParamModule, filter::health, init)

You can access it using filter::health::PARAM_min.