save some log structure flash when features disabled #45331

Job	Run time
build (stm32f7, chibios, 10)	13m 22s
build (stm32h7, chibios, 10)	12m 47s
build (fmuv2-plane, chibios, 10)	5m 32s
build (periph-build, chibios, 10)	13m 53s
build (iofirmware, chibios, 10)	2m 31s
build (CubeOrange-bootloader, chibios, 10)	1m 11s
build (fmuv3-bootloader, chibios, 10)	1m 6s
build (revo-bootloader, chibios, 10)	1m 5s
build (stm32h7-debug, chibios, 10)	7m 8s
build (fmuv3, chibios, 10)	14m 16s
build (revo-mini, chibios, 10)	10m 31s
build (MatekF405-Wing, chibios, 10)	11m 18s
build (CubeOrange-ODID, chibios, 10)	8m 16s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 7s
build (configure-all, chibios, 10)	11m 41s
build (build-options-defaults-test, chibios, 10)	23m 39s
build (signing, chibios, 10)	9m 10s
build (CubeOrange-PPP, chibios, 10)	6m 49s
build (CubeRed-EKF2, chibios, 10)	6m 55s
build (SOHW, chibios, 10)	10m 48s
build (Pixhawk6X-PPPGW, chibios, 10)	3m 13s
build (new-check, chibios, 10)	13m 58s
	3h 10m 16s

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