AP_Scripting: Add filesystem format #34493

Job	Run time
build-gcc-heli	2m 9s
build (base)	2m 39s
build (clang)	2m 6s
autotest-heli (sitltest-heli)	12m 1s
autotest (sitltest-copter-tests1a)	11m 54s
autotest (sitltest-copter-tests1b)	13m 31s
autotest (sitltest-copter-tests1c)	12m 23s
autotest (sitltest-copter-tests1d)	12m 0s
autotest (sitltest-copter-tests1e)	13m 50s
autotest (sitltest-copter-tests2a)	13m 53s
autotest (sitltest-copter-tests2b)	26m 27s
	2h 2m 53s

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