wifi_hwsim: merge all security types into one setup

this should speedup the change between security types, as no change is required, prepare is done only once.

Also, switch to namespace as for every security type new virtual interface is created (main log would not be so clear). Only wlan0 remained in the main namespace.

@RunTests:simwifi_p2p_connect,simwifi_open,simwifi_wep_ask_passwd,simwifi_wep_tls,simwifi_wep_ttls_mschapv2_eap,simwifi_wep_peap_gtc,simwifi_wpa2psk_profile,simwifi_wpa2psk_no_profile,simwifi_tls,simwifi_tls_bad_private_key_password,simwifi_tls_no_private_key_password,simwifi_peap_gtc,simwifi_peap_md5,simwifi_peap_mschapv2,simwifi_ttls_pap,simwifi_ttls_chap,simwifi_ttls_mschap,simwifi_ttls_mschapv2,simwifi_ttls_mschapv2_eap,simwifi_ttls_md5,simwifi_ttls_gtc,simwifi_wpa3_personal,simwifi_wpa3_personal_device_connect_ask,simwifi_teardown