hidden or unbroadcasted ssid in setup-alpine
During setup-alpine, if we try to connect to a hidden network, it fails due to this condition: https://gitlab.alpinelinux.org/alpine/alpine-conf/-/blob/e2965a2d5d90297741fd37a1090fe49bc411c65b/setup-interfaces.in#L211
Invalid SSID: ..
It should allow us to connect with the hidden network's SSID and use scan_ssid=1
under the hood for wpa_supplicant.conf.