esp_wifi: Always connect Station in PMF mode if possible

While using esp_wifi_set_config, flag pmf_capable defaults to 0.
Users may not bother to enable it, which prevents connection to a
WPA3 AP. Or the AP may reset into WPA3 mode failing the re-connection.
To ensure better security, deprecate the pmf_capable flag and set it to
true internally.

components/wpa_supplicant/esp_supplicant/src/esp_dpp.c

@@ -184,7 +184,6 @@ static int esp_dpp_handle_config_obj(struct dpp_authentication *auth,
             os_memcpy(wifi_cfg->sta.password, conf->passphrase,
                       sizeof(wifi_cfg->sta.password));
         if (conf->akm == DPP_AKM_PSK_SAE) {
-            wifi_cfg->sta.pmf_cfg.capable = true;
             wifi_cfg->sta.pmf_cfg.required = true;
         }
     }