[tests] Fix clang-tidy warnings in custom_api_device_component fixture (#12390)

tests/integration/fixtures/external_components/custom_api_device_component/custom_api_device_component.cpp

@@ -52,6 +52,7 @@ void CustomAPIDeviceComponent::on_service_with_arrays(std::vector<bool> bool_arr
   }
 }
 
+// NOLINTNEXTLINE(performance-unnecessary-value-param)
 void CustomAPIDeviceComponent::on_ha_state_changed(std::string entity_id, std::string state) {
   ESP_LOGI(TAG, "Home Assistant state changed for %s: %s", entity_id.c_str(), state.c_str());
   ESP_LOGI(TAG, "This subscription uses std::string API for backward compatibility");

tests/integration/fixtures/external_components/custom_api_device_component/custom_api_device_component.h

@@ -24,6 +24,7 @@ class CustomAPIDeviceComponent : public Component, public CustomAPIDevice {
                               std::vector<float> float_array, std::vector<std::string> string_array);
 
   // Test Home Assistant state subscription with std::string API
+  // NOLINTNEXTLINE(performance-unnecessary-value-param)
   void on_ha_state_changed(std::string entity_id, std::string state);
 };