AP_TECS: moved justifications to commit description

To connect loadFactor to airspeed we can use formula of balancing between lift force and gravity force:
liftForce = loadFactor * gravityForce; on the other hand lift force can be expressed as
liftForce = 0.5 * lifCoefficient * airDensity * sq(airspeed) * referenceArea; minimum airseepd is at loadFactor = 1
and lift force only balances the gravit force, so gravity force (which is same as lift force at minimum airspeed) with minimum airspeed can be expressed as
gravityForce = 0.5 * lifCoefficient * airDensity * sq(airspeed_min) * referenceArea; substituting gravit force in previous formula gives us
0.5 * lifCoefficient * airDensity * sq(airspeed) * referenceArea = loadFactor * 0.5 * lifCoefficient * airDensity * sq(airspeed_min) * referenceArea;
from where we get:
loadFactor = sq(airspeed / airspeed_min); and_TASmin should be
_TASmin *= safe_sqrt(_load_factor);

Author: abaghiyan

libraries/AP_TECS/AP_TECS.cpp

@@ -415,12 +415,7 @@ void AP_TECS::_update_speed(float DT)
     if (aparm.stall_prevention) {
         // when stall prevention is active we raise the minimum
         // airspeed based on aerodynamic load factor
-		/*
-		As load factor formula fixed in ArduPlane Plane::update_load_factor,
-		here also should be changes done according to comments by Peter Hall
-		see issue #24320 [https://github.com/ArduPilot/ardupilot/issues/24320].
-		*/
-		
+				
         _TASmin *= safe_sqrt(_load_factor);
     }