Add ESP32 internal temperature measurement and automatic Actuator switch Off (#1384)

* Add automatic stop of relay following ESP32 temperature

To avoid overheating when too much current goes through the device.

Add internal temperature reporting to SYStoMQTT

This function is not available with ESP32 S3 and C3

* Temp update and error log

Update of the temperature to get closer to the datasheet of the ESP32 -40 +85C
and add the module name to the error log

main/ZmqttDiscovery.ino

@@ -421,6 +421,15 @@ void pubMqttDiscovery() {
 #    endif
 #  endif
 #  ifdef ESP32
+  createDiscovery("sensor", //set Type
+                  subjectSYStoMQTT, "SYS: Internal temperature", (char*)getUniqueId("tempc", "").c_str(), //set state_topic,name,uniqueId
+                  "", "temperature", "{{ value_json.tempc }}", //set availability_topic,device_class,value_template,
+                  "", "", "°C", //set,payload_on,payload_off,unit_of_meas,
+                  0, //set  off_delay
+                  "", "", true, "", //set,payload_avalaible,payload_not avalaible   ,is a gateway entity, command topic
+                  "", "", "", "", false, // device name, device manufacturer, device model, device MAC
+                  stateClassMeasurement //State Class
+  );
 #    ifdef ZgatewayBT
   createDiscovery("sensor", //set Type
                   subjectSYStoMQTT, "SYS: Low Power Mode", (char*)getUniqueId("lowpowermode", "").c_str(), //set state_topic,name,uniqueId