Issue MarlinFirmware#3689 BugFix Correct movement for G29 with delta

The auto level routine was hitting the bed while moving between probe points.  It was not using segemented movements so the change proposed uses the prepare_move_delta instead of prepare_move_raw method.

Marlin/Marlin_main.cpp

@@ -1632,7 +1632,7 @@ static void setup_for_endstop_move() {
       destination[X_AXIS] = x;
       destination[Y_AXIS] = y;
       destination[Z_AXIS] = z;
-      prepare_move_raw(); // this will also set_current_to_destination
+      prepare_move_delta(destination); // this will also set_current_to_destination
       stepper.synchronize();
 
     #else