[DISC] Ram usage and flash size optimization (#2223)

Fix duplicate W and keep units and classes in flash
Use macro for discovery classes and units
[BREAKING] change gateway sensor unique id
module - parameter
Standardize the use of createDiscoveryFromList

Co-authored-by: Florian <1technophile@users.noreply.github.com>

main/sensorDS1820.cpp

@@ -122,9 +122,9 @@ void pubOneWire_HADiscovery() {
                       (char*)("DS12B20_" + String(index + 1) + "_c").c_str(),
                       (char*)(ds1820_addr[index] + "_c").c_str(),
                       will_Topic,
-                      "temperature",
+                      HASS_CLASS_TEMPERATURE,
                       jsonTempc,
-                      "", "", "°C",
+                      "", "", HASS_UNIT_CELSIUS,
                       0, "", "", true, "",
                       "", "", "", "", false,
                       stateClassMeasurement // state class