Add airspeed message to uxrce dds topics

[qtweng]

Solved Problem

Airspeed message not included in dds_topics.yaml, but is significant for offboard control of fixed wing vehicles.

Fixes #{Github issue ID}

Solution

• Added airspeed topic to dds_topics.yaml

Test coverage

• Simulation/hardware testing: built for orange cube plus and verified topic readable by ros2 through uart

[bresch]

Don't you rather want AirspedValidated?

[qtweng]

Yes, will be updating to use airspeed validated, flashing, and verifying.

[qtweng]

Verified that it works on cube orange plus