variants(h5): add generic STM32H503CB support #630

Job	Run time
Check CMake usage (NUCLEO_F091RC)	44s
Check CMake usage (NUCLEO_F091RC)	44s
Check CMake usage (NUCLEO_F103RB)	50s
Check CMake usage (NUCLEO_F103RB)	50s
Check CMake usage (NUCLEO_F207ZG)	1m 13s
Check CMake usage (NUCLEO_F207ZG)	43s
Check CMake usage (NUCLEO_F303RE)	48s
Check CMake usage (NUCLEO_F303RE)	48s
Check CMake usage (NUCLEO_F411RE)	46s
Check CMake usage (NUCLEO_F411RE)	46s
Check CMake usage (NUCLEO_F767ZI)	42s
Check CMake usage (NUCLEO_F767ZI)	42s
Check CMake usage (NUCLEO_G0B1RE)	42s
Check CMake usage (NUCLEO_G0B1RE)	42s
Check CMake usage (NUCLEO_G474RE)	47s
Check CMake usage (NUCLEO_G474RE)	47s
Check CMake usage (NUCLEO_H563ZI)	50s
Check CMake usage (NUCLEO_H563ZI)	50s
Check CMake usage (NUCLEO_H743ZI2)	55s
Check CMake usage (NUCLEO_H743ZI2)	55s
Check CMake usage (NUCLEO_L073RZ)	46s
Check CMake usage (NUCLEO_L073RZ)	46s
Check CMake usage (NUCLEO_L152RE)	45s
Check CMake usage (NUCLEO_L152RE)	45s
Check CMake usage (NUCLEO_L476RG)	1m 27s
Check CMake usage (NUCLEO_L476RG)	50s
Check CMake usage (NUCLEO_L552ZE_Q)	49s
Check CMake usage (NUCLEO_L552ZE_Q)	49s
Check CMake usage (NUCLEO_U575ZI_Q)	1m 21s
Check CMake usage (NUCLEO_U575ZI_Q)	46s
Check CMake usage (P_NUCLEO_WB55RG)	1m 1s
Check CMake usage (P_NUCLEO_WB55RG)	47s
Check CMake usage (NUCLEO_WBA55CG)	1m 1s
Check CMake usage (NUCLEO_WBA55CG)	41s
Check CMake usage (NUCLEO_WL55JC1)	40s
Check CMake usage (NUCLEO_WL55JC1)	44s
	30m 2s

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