AP_TECS: Constrained throttle in airspeedless #31379

Job	Run time
build (chibios, Durandal)	18m 31s
build (chibios, MatekF405)	16m 20s
build (chibios, KakuteF7)	16m 48s
build (chibios, MatekH743-bdshot)	20m 27s
build (chibios, Pixhawk1-1M)	18m 36s
build (chibios, MatekF405-CAN)	3m 59s
build (chibios, DrotekP3Pro)	4m 0s
build (chibios, Hitec-Airspeed)	5m 44s
build (chibios, f103-GPS)	5m 57s
build (disco, armhf)	16m 46s
	2h 7m 8s

Provide feedback