WiFi: add scan() #720

Job	Run time
Build and package cores	8m 34s
Split off zephyr_unoq	12s
Split off zephyr_contrib	9s
Split off zephyr_main	9s
Split off zephyr	18s
Test zephyr:unoq	2m 28s
Test zephyr_main:giga	2m 35s
Test zephyr_main:opta	2m 35s
Test zephyr_contrib:frdm_rw612	1m 44s
Test zephyr_main:portentah7	2m 35s
Test zephyr_contrib:frdm_mcxn947	2m 30s
Test zephyr_main:nano33ble	2m 35s
Test zephyr_contrib:ek_ra8d1	2m 29s
Test zephyr_main:niclasense	2m 29s
Test zephyr_main:portentac33	1m 56s
Publish jsons	18s
Collect logs	6s
verify-core	-1s
Publish core	-1s
cleanup-artifacts	3s
	33m 43s

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