networking - move setHostname to base class SocketWrapper #1226

Job	Run time
compile-examples (arduino:mbed:nano33ble, nano33ble)	7m 47s
compile-examples (arduino:mbed:envie_m7, envie_m7)	18m 48s
compile-examples (arduino:mbed:envie_m7:target_core=cm4, envie_m7_core_cm4)	4m 23s
compile-examples (arduino:mbed:nanorp2040connect, nanorp2040connect)	13m 7s
compile-examples (arduino:mbed:nicla_sense, nicla_sense)	13m 45s
compile-examples (arduino:mbed:nicla_vision, nicla_vision)	18m 29s
compile-examples (arduino:mbed:opta, opta)	22m 10s
compile-examples (arduino:mbed:giga, giga)	31m 12s
compile-examples (arduino:mbed:nicla_voice, nicla_voice)	5m 45s
compile-examples (arduino:mbed:edge_control, edge_control)	6m 32s
	2h 21m 58s

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