Add support for DHCP hostname #1151

Job	Run time
compile-examples (arduino:mbed:nano33ble)	8m 1s
compile-examples (arduino:mbed:envie_m7)	16m 38s
compile-examples (arduino:mbed:nanorp2040connect)	13m 28s
compile-examples (arduino:mbed:nicla_sense)	7m 50s
compile-examples (arduino:mbed:nicla_vision)	11m 58s
compile-examples (arduino:mbed:opta)	9m 51s
compile-examples (arduino:mbed:giga)	24m 6s
compile-examples (arduino:mbed:nicla_voice)	5m 55s
compile-examples (arduino:mbed:edge_control)	5m 42s
compile-examples (arduino:mbed:envie_m7:target_core=cm4, - libraries/KernelDebug - libraries/Port...	4m 24s
	1h 47m 53s

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