Add support for DHCP hostname #1154

Job	Run time
compile-examples (arduino:mbed:nano33ble)	12m 53s
compile-examples (arduino:mbed:envie_m7)	17m 30s
compile-examples (arduino:mbed:nanorp2040connect)	23m 10s
compile-examples (arduino:mbed:nicla_sense)	12m 12s
compile-examples (arduino:mbed:nicla_vision)	19m 58s
compile-examples (arduino:mbed:opta)	26m 50s
compile-examples (arduino:mbed:giga)	40m 47s
compile-examples (arduino:mbed:nicla_voice)	8m 45s
compile-examples (arduino:mbed:edge_control)	8m 48s
compile-examples (arduino:mbed:envie_m7:target_core=cm4, - libraries/KernelDebug - libraries/Port...	4m 36s
	2h 55m 29s

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