Backport clamping of empy==3.3.4 to ArduPilot 4.4 #33908

Job	Run time
build (stm32f7, chibios, 6)	3m 14s
build (stm32f7, chibios, 10)	3m 5s
build (stm32h7, chibios, 6)	2m 31s
build (stm32h7, chibios, 10)	2m 57s
build (fmuv2-plane, chibios, 10)	1m 53s
build (periph-build, chibios, 10)	4m 21s
build (iofirmware, chibios, 6)	1m 10s
build (iofirmware, chibios, 10)	1m 16s
build (CubeOrange-bootloader, chibios, 6)	58s
build (CubeOrange-bootloader, chibios, 10)	56s
build (fmuv3-bootloader, chibios, 10)	1m 3s
build (revo-bootloader, chibios, 6)	1m 5s
build (revo-bootloader, chibios, 10)	1m 18s
build (stm32h7-debug, chibios, 6)	1m 53s
build (stm32h7-debug, chibios, 10)	2m 4s
build (fmuv3, chibios, 6)	4m 32s
build (fmuv3, chibios, 10)	4m 8s
build (revo-mini, chibios, 10)	3m 37s
build (MatekF405-Wing, chibios, 10)	3m 43s
build (CubeOrange-ODID, chibios, 10)	2m 17s
build (configure-all, chibios, 6)	6m 50s
build (configure-all, chibios, 10)	7m 11s
build (build-options-defaults-test, chibios, 6)	4m 52s
build (build-options-defaults-test, chibios, 10)	5m 4s
build (signing, chibios, 10)	2m 28s
build (stm32h7, chibios-py2)	1m 29s
	1h 15m 55s

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