WiFi: add scan() #721

Job	Run time
Build and package cores	9m 55s
Split off zephyr_unoq	10s
Split off zephyr_main	11s
Split off zephyr	16s
Split off zephyr_contrib	9s
Test zephyr_main:giga	2m 32s
Test zephyr_main:portentah7	2m 34s
Test zephyr_main:nano33ble	2m 40s
Test zephyr_main:portentac33	1m 54s
Test zephyr_main:niclasense	2m 32s
Test zephyr_contrib:frdm_rw612	2m 22s
Test zephyr_main:opta	2m 34s
Test zephyr_contrib:frdm_mcxn947	2m 23s
Test zephyr:unoq	2m 24s
Test zephyr_contrib:ek_ra8d1	2m 28s
Collect logs	7s
Publish jsons	13s
verify-core	0s
Publish core	0s
cleanup-artifacts	6s
	35m 30s

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