AP_GPS: Support integrated headings from SBF #33554

Job	Run time
build (stm32f7, chibios, 10)	3m 46s
build (stm32h7, chibios, 10)	3m 19s
build (fmuv2-plane, chibios, 10)	1m 50s
build (periph-build, chibios, 10)	8m 16s
build (iofirmware, chibios, 10)	1m 45s
build (CubeOrange-bootloader, chibios, 10)	58s
build (fmuv3-bootloader, chibios, 10)	51s
build (revo-bootloader, chibios, 10)	52s
build (stm32h7-debug, chibios, 10)	2m 9s
build (fmuv3, chibios, 10)	5m 4s
build (revo-mini, chibios, 10)	3m 46s
build (MatekF405-Wing, chibios, 10)	4m 5s
build (CubeOrange-ODID, chibios, 10)	2m 26s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 11s
build (configure-all, chibios, 10)	8m 27s
build (build-options-defaults-test, chibios, 10)	6m 0s
build (signing, chibios, 10)	2m 34s
	57m 19s

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