Copter: free allocations in case of allocation failure #45868

Job	Run time
build (stm32f7, chibios, 10)	3m 43s
build (stm32h7, chibios, 10)	3m 24s
build (fmuv2-plane, chibios, 10)	2m 10s
build (periph-build, chibios, 10)	3m 47s
build (iofirmware, chibios, 10)	1m 29s
build (CubeOrange-bootloader, chibios, 10)	49s
build (fmuv3-bootloader, chibios, 10)	1m 10s
build (revo-bootloader, chibios, 10)	1m 9s
build (stm32h7-debug, chibios, 10)	2m 20s
build (fmuv3, chibios, 10)	5m 33s
build (revo-mini, chibios, 10)	4m 23s
build (MatekF405-Wing, chibios, 10)	4m 43s
build (CubeOrange-ODID, chibios, 10)	2m 38s
build (CubeRedPrimary-bootloader, chibios, 10)	1m 9s
build (configure-all, chibios, 10)	11m 31s
build (build-options-defaults-test, chibios, 10)	7m 2s
build (signing, chibios, 10)	2m 42s
build (CubeOrange-PPP, chibios, 10)	2m 13s
build (CubeRed-EKF2, chibios, 10)	2m 24s
build (SOHW, chibios, 10)	3m 19s
build (Pixhawk6X-PPPGW, chibios, 10)	1m 9s
build (new-check, chibios, 10)	4m 41s
	1h 13m 28s

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