WiFi and Eth Dhcp hostname support #1217

Job	Run time
compile-examples (arduino:mbed:nano33ble, nano33ble)	7m 47s
compile-examples (arduino:mbed:envie_m7, envie_m7)	16m 36s
compile-examples (arduino:mbed:envie_m7:target_core=cm4, envie_m7_core_cm4)	4m 27s
compile-examples (arduino:mbed:nanorp2040connect, nanorp2040connect)	13m 27s
compile-examples (arduino:mbed:nicla_sense, nicla_sense)	13m 36s
compile-examples (arduino:mbed:nicla_vision, nicla_vision)	10m 15s
compile-examples (arduino:mbed:opta, opta)	9m 30s
compile-examples (arduino:mbed:giga, giga)	23m 38s
compile-examples (arduino:mbed:nicla_voice, nicla_voice)	6m 7s
compile-examples (arduino:mbed:edge_control, edge_control)	5m 41s
	1h 51m 4s

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