AP_Scripting: Add filesystem format #35494

Job	Run time
build (stm32f7, chibios, 10)	3m 49s
build (stm32h7, chibios, 10)	3m 25s
build (fmuv2-plane, chibios, 10)	1m 50s
build (periph-build, chibios, 10)	4m 56s
build (iofirmware, chibios, 10)	1m 24s
build (CubeOrange-bootloader, chibios, 10)	52s
build (fmuv3-bootloader, chibios, 10)	56s
build (revo-bootloader, chibios, 10)	1m 0s
build (stm32h7-debug, chibios, 10)	2m 32s
build (fmuv3, chibios, 10)	5m 5s
build (revo-mini, chibios, 10)	3m 52s
build (MatekF405-Wing, chibios, 10)	4m 21s
build (CubeOrange-ODID, chibios, 10)	2m 56s
build (CubeRedPrimary-bootloader, chibios, 10)	52s
build (configure-all, chibios, 10)	9m 9s
build (build-options-defaults-test, chibios, 10)	6m 8s
build (signing, chibios, 10)	2m 39s
build (CubeOrange-PPP, chibios, 10)	2m 7s
build (CubeOrange-SOHW, chibios, 10)	2m 12s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 38s
	1h 1m 43s

Provide feedback