AP_DDS: ensure zero rotation quaternions are normalised #38781

Job	Run time
build (stm32f7, chibios, 10)	4m 7s
build (stm32h7, chibios, 10)	3m 50s
build (fmuv2-plane, chibios, 10)	2m 20s
build (periph-build, chibios, 10)	3m 54s
build (iofirmware, chibios, 10)	1m 43s
build (CubeOrange-bootloader, chibios, 10)	1m 5s
build (fmuv3-bootloader, chibios, 10)	58s
build (revo-bootloader, chibios, 10)	59s
build (stm32h7-debug, chibios, 10)	2m 17s
build (fmuv3, chibios, 10)	5m 13s
build (revo-mini, chibios, 10)	4m 15s
build (MatekF405-Wing, chibios, 10)	4m 38s
build (CubeOrange-ODID, chibios, 10)	3m 6s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 1s
build (configure-all, chibios, 10)	10m 1s
build (build-options-defaults-test, chibios, 10)	7m 44s
build (signing, chibios, 10)	3m 9s
build (CubeOrange-PPP, chibios, 10)	2m 30s
build (SOHW, chibios, 10)	3m 37s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 12s
	1h 7m 39s

Provide feedback