AP_RangeFinder: Notify different alerts #35521

Job	Run time
build (chibios, Durandal)	17m 26s
build (chibios, MatekF405)	15m 14s
build (chibios, KakuteF7)	13m 53s
build (chibios, MatekH743-bdshot)	17m 27s
build (chibios, Pixhawk1-1M)	15m 4s
build (chibios, MatekF405-CAN)	2m 11s
build (chibios, DrotekP3Pro)	2m 21s
build (chibios, Hitec-Airspeed)	2m 59s
build (chibios, f103-GPS)	3m 46s
build (disco, armhf)	14m 21s
	1h 44m 42s

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