Improvements for -S2

- new partition table for boards with UF2 boot (Adafruit qt py S2)
- better treatment of debug out using "USBCDC" native port
- workarounds for watchdog crashes on -S2
- Add missing but mandatory build flags for -S2 and -C3

wled00/pin_manager.cpp

@@ -114,7 +114,7 @@ String PinManagerClass::getPinSpecialText(int gpio) {  // special purpose PIN in
 
     #elif defined(CONFIG_IDF_TARGET_ESP32S2)
       // ESP32-S2
-      if (gpio > 38 && gpio < 43) return (F("USB (CDC) / JTAG"));
+      //if (gpio > 38 && gpio < 43) return (F("USB (CDC) / JTAG"));  // note to self: this seems to be wrong. need to fix later.
       if (gpio == 46) return (F("pulled-down, input only"));
       //if (gpio == 0 || gpio == 45 || gpio == 46) return (F("(strapping pin)"));