Add Noetic support for bridging NavSat

[TyHowellWork]

🎉 New feature

Ports #224

Summary

Adds two-way bridge for NavSat messages between ROS Noetic and IGN.

Test it

Test IGN->ROS by running roslaunch ros_ign_gazebo_demos navsat.launch.
Test ROS->IGN by roslaunch ros_ign_gazebo_demos navsat.launch and ign topic -t /navsat -e

rostopic pub -r 1 /navsat sensor_msgs/NavSatFix "header:
  seq: 10
  stamp: {secs: 10, nsecs: 0}
  frame_id: 'back_to_ign'
status: {status: 0, service: 0}
latitude: 10.0
longitude: 10.0
altitude: 10.0
position_covariance: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
position_covariance_type: 0"

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

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