add studiolab_picoexpander #17470

Job	Run time
scheduler	50s
mpy-cross-mac	29s
windows-zephyr	-1s
docs	4m 24s
windows	-1s
tests / run (all)	57s
tests / run (mpy)	36s
tests / run (native_mpy)	42s
tests / run (native)	51s
mpy-cross / build (static)	20s
mpy-cross / build (static-aarch64)	39s
mpy-cross / build (static-mingw)	59s
mpy-cross / build (static-raspbian)	49s
ports (raspberrypi) / board (studiolab_picoexpander)	3m 0s
	14m 34s

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