dfu: boot: mcuboot_shell: Prevent erasing MCUboot/app flash areas#66107

fabiobaltieri merged 2 commits intozephyrproject-rtos:mainzephyrproject-rtos/zephyr:mainfrom

nordicjm:fixmcubootshellbricknordicjm/zephyr:fixmcubootshellbrickCopy head branch name to clipboard