When an AP is found during a connecting scan but filtered out due to security
mismatch (FT-PSK only with FT disabled, WPA3 without PMF-required,
OWE without MFPR), set authmode_incompatible flag so the disconnect
reason is WIFI_REASON_NO_AP_FOUND_W_COMPATIBLE_SECURITY (210) instead
of WIFI_REASON_NO_AP_FOUND (201).