px4: sitl fix filepath regression (#23457) #24886

Job	Run time
build (check_format)	1m 3s
build (check_newlines)	1m 25s
build (tests)	5m 34s
build (tests_coverage)	7m 7s
build (px4_fmu-v2_default stack_check)	3m 16s
build (validate_module_configs)	51s
build (shellcheck_all)	1m 42s
build (NO_NINJA_BUILD=1 px4_fmu-v5_default)	4m 15s
build (NO_NINJA_BUILD=1 px4_sitl_default)	3m 22s
build (px4_sitl_allyes)	4m 29s
build (airframe_metadata)	1m 10s
build (module_documentation)	1m 5s
build (parameters_metadata)	1m 10s
	36m 29s

Provide feedback