Ender 3 V2 BL24C16 EEPROM support (#18758)

Marlin/src/HAL/STM32F1/eeprom_bl24cxx.cpp

Marlin/src/HAL/STM32F1/eeprom_if_iic.cpp

Marlin/src/HAL/shared/eeprom_api.h

Marlin/src/MarlinCore.cpp

Marlin/src/gcode/eeprom/M500-M504.cpp

Marlin/src/inc/Conditionals_post.h

Marlin/src/inc/SanityCheck.h

Marlin/src/lcd/dwin/dwin.cpp

Marlin/src/lcd/dwin/dwin.h

Marlin/src/libs/BL24CXX.cpp

Marlin/src/libs/BL24CXX.h

Marlin/src/libs/hex_print_routines.cpp

Marlin/src/pins/stm32f1/pins_CREALITY_V4.h

buildroot/tests/STM32F103RET6_creality-tests