[2.0.x] Buffer overflow and scroll fix, UTF8 cleanup (#10844)

Marlin/src/HAL/HAL_AVR/HAL_spi_AVR.cpp

Marlin/src/feature/bedlevel/ubl/ubl.h

Marlin/src/gcode/bedlevel/G26.cpp

Marlin/src/gcode/calibrate/G33.cpp

Marlin/src/lcd/dogm/status_screen_DOGM.h

Marlin/src/lcd/dogm/status_screen_lite_ST7920.h

Marlin/src/lcd/fontutils.cpp

Marlin/src/lcd/fontutils.h

Marlin/src/lcd/lcdprint.h

Marlin/src/lcd/lcdprint_hd44780.cpp

Marlin/src/lcd/lcdprint_u8g.cpp

Marlin/src/lcd/u8g_fontutf8.cpp

Marlin/src/lcd/u8g_fontutf8.h

Marlin/src/lcd/ultralcd.cpp

Marlin/src/lcd/ultralcd_impl_DOGM.h

Marlin/src/lcd/ultralcd_impl_HD44780.h

frameworks/CMSIS/LPC1768/lib/usb/usbhw.cpp