AP_DDS: Support publishing GeoPoseStamped

[Ryanf55]

          I always viewed `NavSatFix` as rawish sensor data more than an actual position output.

Similar to the way for orientation we use a Pose message with a Quaternion field, and not, say, a MagneticField (https://docs.ros2.org/foxy/api/sensor_msgs/msg/MagneticField.html) message.

As it's appropriate here, I'll mention the option of using the geographic_msgs GeoPoseStamped (https://github.com/ros-geographic-info/geographic_info/blob/ros2/geographic_msgs/msg/GeoPoseStamped.msg) type.

Originally posted by @russkel in #23277 (comment)

This ticket is to add GeoPoseStamped support, which is the fused GPS position of the vehicle (from AHRS).

[pedro-fuoco]

I'll look into it!