[wifi_signal] Add ifdef guards for clang-tidy compatibility (#12362)

esphome/components/wifi_signal/wifi_signal_sensor.h

@@ -7,16 +7,24 @@
 #ifdef USE_WIFI
 namespace esphome::wifi_signal {
 
+#ifdef USE_WIFI_LISTENERS
 class WiFiSignalSensor : public sensor::Sensor, public PollingComponent, public wifi::WiFiConnectStateListener {
+#else
+class WiFiSignalSensor : public sensor::Sensor, public PollingComponent {
+#endif
  public:
+#ifdef USE_WIFI_LISTENERS
   void setup() override { wifi::global_wifi_component->add_connect_state_listener(this); }
+#endif
   void update() override { this->publish_state(wifi::global_wifi_component->wifi_rssi()); }
   void dump_config() override;
 
   float get_setup_priority() const override { return setup_priority::AFTER_WIFI; }
 
+#ifdef USE_WIFI_LISTENERS
   // WiFiConnectStateListener interface - update RSSI immediately on connect
   void on_wifi_connect_state(const std::string &ssid, const wifi::bssid_t &bssid) override { this->update(); }
+#endif
 };
 
 }  // namespace esphome::wifi_signal