AP_RangeFinder: cleanup rangefinder timeout handling #36907

Job	Run time
build (stm32f7, chibios, 10)	4m 22s
build (stm32h7, chibios, 10)	4m 20s
build (fmuv2-plane, chibios, 10)	2m 4s
build (periph-build, chibios, 10)	4m 45s
build (iofirmware, chibios, 10)	1m 44s
build (CubeOrange-bootloader, chibios, 10)	1m 7s
build (fmuv3-bootloader, chibios, 10)	49s
build (revo-bootloader, chibios, 10)	53s
build (stm32h7-debug, chibios, 10)	2m 44s
build (fmuv3, chibios, 10)	5m 38s
build (revo-mini, chibios, 10)	4m 29s
build (MatekF405-Wing, chibios, 10)	4m 29s
build (CubeOrange-ODID, chibios, 10)	3m 14s
build (CubeRedPrimary-bootloader, chibios, 10)	51s
build (configure-all, chibios, 10)	9m 11s
build (build-options-defaults-test, chibios, 10)	8m 40s
build (signing, chibios, 10)	3m 31s
build (CubeOrange-PPP, chibios, 10)	2m 29s
build (SOHW, chibios, 10)	3m 37s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 27s
	1h 10m 24s

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