Add AT32 support #3185

Job	Run time
set-matrix	4s
make-os (windows-latest) / family (stm32h7)	2m 11s
make-os (macos-latest) / family (stm32h7)	1m 4s
arm-iar	7m 11s
make	0s
cmake (aarch64-gcc) / family (broadcom_64bit)	31s
cmake (msp430-gcc) / family (msp430)	18s
cmake (arm-gcc) / family (at32f403a_407 at32f415)	21s
cmake (arm-gcc) / family (broadcom_32bit)	18s
cmake (arm-gcc) / family (da1469x)	59s
cmake (arm-gcc) / family (imxrt)	5m 7s
cmake (arm-gcc) / family (kinetis_k kinetis_kl kinetis_k32l2)	2m 10s
cmake (arm-gcc) / family (lpc11 lpc13 lpc15)	1m 7s
cmake (riscv-gcc) / family (ch32v10x ch32v20x ch32v307 fomu gd32vf103)	1m 55s
cmake (arm-gcc) / family (lpc17 lpc18 lpc40 lpc43)	2m 49s
cmake (arm-gcc) / family (lpc51 lpc54 lpc55)	2m 37s
cmake (arm-gcc) / family (max32650 max32666 max32690 max78002)	3m 15s
cmake (arm-gcc) / family (mcx)	1m 26s
cmake (arm-gcc) / family (mm32)	43s
cmake (arm-gcc) / family (msp432e4 tm4c)	55s
cmake (arm-gcc) / family (nrf)	4m 4s
cmake (arm-gcc) / family (ra)	2m 42s
cmake (arm-gcc) / family (rp2040)	5m 4s
cmake (arm-gcc) / family (samd11 saml2x)	1m 39s
cmake (arm-gcc) / family (samd21)	3m 29s
cmake (arm-gcc) / family (samd5x_e5x samg)	3m 11s
cmake (arm-gcc) / family (stm32f0 stm32f1 stm32f2 stm32f3)	2m 30s
cmake (arm-gcc) / family (stm32f4)	3m 25s
cmake (arm-gcc) / family (stm32f7)	2m 12s
cmake (arm-gcc) / family (stm32g0 stm32g4 stm32h5)	2m 37s
cmake (arm-gcc) / family (stm32h7)	3m 16s
cmake (arm-gcc) / family (stm32l0 stm32l4)	1m 55s
cmake (arm-gcc) / family (stm32u5 stm32wb)	2m 20s
cmake (arm-gcc) / family (xmc4000)	59s
	1h 14m 24s

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