add "toString" function with IPAddress #445

Job	Run time
Check CMake usage (NUCLEO_F091RC)	40s
Check CMake usage (NUCLEO_F103RB)	45s
Check CMake usage (NUCLEO_F207ZG)	44s
Check CMake usage (NUCLEO_F303RE)	45s
Check CMake usage (NUCLEO_F411RE)	44s
Check CMake usage (NUCLEO_F767ZI)	41s
Check CMake usage (NUCLEO_G0B1RE)	53s
Check CMake usage (NUCLEO_G474RE)	48s
Check CMake usage (NUCLEO_H563ZI)	43s
Check CMake usage (NUCLEO_H743ZI2)	49s
Check CMake usage (NUCLEO_L073RZ)	45s
Check CMake usage (NUCLEO_L152RE)	44s
Check CMake usage (NUCLEO_L476RG)	48s
Check CMake usage (NUCLEO_L552ZE_Q)	49s
Check CMake usage (NUCLEO_U575ZI_Q)	43s
Check CMake usage (P_NUCLEO_WB55RG)	35s
Check CMake usage (NUCLEO_WBA55CG)	37s
Check CMake usage (NUCLEO_WL55JC1)	37s
	13m 10s

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