Add gz model for quadtailsitter

[Perrrewi]

Solved Problem
Transferring models from gazebo classic to gz. Added airspeed sensor as well. Tuned the AdvancedLiftDrag plugin to make sure the vehicle flies sufficiently good.

Fixes #23602

Test Coverage
It was tested on Ubuntu 22.04 using QGroundControl

Context
Before tuning:

After tuning:

There is a former pr about this, which was reverted: #50

Associated PR's

• Adding descriptions of tiltrotor and quadtailsitter PX4-user_guide#3469

[hamishwillee]

Awesome, when this goes in, can we mirror it in the docs.

This would be an update to these places:

• https://docs.px4.io/main/en/sim_gazebo_gz/vehicles.html#vtol
• https://docs.px4.io/main/en/sim_gazebo_gz/#running-the-simulation

And maybe a simulation section at the end of https://docs.px4.io/main/en/frames_vtol/tailsitter.html

[Perrrewi]

Made a draft for the description as well: PX4/PX4-user_guide#3469

[Claudio-Chies]

The rest looks good to me, I added a small formatting fix.
It might be worth a look at placing the meshes for the props in a separate folder, as multiple models like the advanced_plane or px4vision also use the same mesh, and we have the same file multiple times across different models.