🩹 Fix and clean up E3V2 draw (#24013)

Marlin/src/lcd/e3v2/common/dwin_api.cpp

 //  rlimit: To limit the drawn string length
 void DWIN_Draw_String(bool bShow, uint8_t size, uint16_t color, uint16_t bColor, uint16_t x, uint16_t y, const char * const string, uint16_t rlimit/*=0xFFFF*/) {
   DWIN_Draw_Rectangle(1, bColor, x, y, x + (fontWidth(size) * strlen_P(string)), y + fontHeight(size));
-  DWIN_UpdateLCD();
   constexpr uint8_t widthAdjust = 0;
   size_t i = 0;
   DWIN_Byte(i, 0x11);
   DWIN_Word(i, y);
   DWIN_Text(i, string, rlimit);
   DWIN_Send(i);
-  DWIN_UpdateLCD();
 }
 
 // Draw a positive integer
   #endif
 
   DWIN_Send(i);
-  DWIN_UpdateLCD();
 }
 
 // Draw a floating point number
   DWIN_Byte(i, fvalue[0]);
   */
   DWIN_Send(i);
-  DWIN_UpdateLCD();
 }
 
 // Draw a floating point number

Marlin/src/lcd/e3v2/marlinui/ui_common.cpp

   dwin_font.solid = true;
   dwin_font.fg = Color_White;
   dwin_font.bg = Color_Bg_Black;
-  DWIN_Draw_Box(1, Color_Bg_Black, 0, (LCD_PIXEL_HEIGHT - (STAT_FONT_HEIGHT) - 1), 272, STAT_FONT_HEIGHT + 1);
   lcd_moveto_xy(0, LCD_PIXEL_HEIGHT - (STAT_FONT_HEIGHT) - 1);
 
   constexpr uint8_t max_status_chars = (LCD_PIXEL_WIDTH) / (STAT_FONT_WIDTH);