Expose JOYSTICK_DEBUG to the general user (#19394)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/Configuration_adv.h

   #define JOY_X_LIMITS { 5600, 8190-100, 8190+100, 10800 } // min, deadzone start, deadzone end, max
   #define JOY_Y_LIMITS { 5600, 8250-100, 8250+100, 11000 }
   #define JOY_Z_LIMITS { 4800, 8080-100, 8080+100, 11550 }
+  //#define JOYSTICK_DEBUG
 #endif
 
 /**

Marlin/src/feature/joystick.h

 #include "../core/macros.h"
 #include "../module/temperature.h"
 
-//#define JOYSTICK_DEBUG
-
 class Joystick {
   friend class Temperature;
   private: