Add support for DHCP hostname #1153

Job	Run time
compile-examples (arduino:mbed:nano33ble)	12m 45s
compile-examples (arduino:mbed:envie_m7)	17m 2s
compile-examples (arduino:mbed:nanorp2040connect)	22m 52s
compile-examples (arduino:mbed:nicla_sense)	12m 40s
compile-examples (arduino:mbed:nicla_vision)	20m 5s
compile-examples (arduino:mbed:opta)	24m 18s
compile-examples (arduino:mbed:giga)	41m 57s
compile-examples (arduino:mbed:nicla_voice)	8m 43s
compile-examples (arduino:mbed:edge_control)	8m 58s
compile-examples (arduino:mbed:envie_m7:target_core=cm4, - libraries/KernelDebug - libraries/Port...	4m 35s
	2h 53m 55s

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