Changed

• Improved the error message when the argument in --batch-json does not parse as a JSON string.
• Renamed the --batch-path argument in nrfutil device batch-execute to --batch-file. An alias for --batch-path is kept for backwards compatibility.
• The operation for erasing the all external flash now errors out if there is no external flash memory defined and if the external flash memory config is missing. The operation would earlier ignore these cases and claim success.
• Updated the description of the --x-sdfw-variant option to use the name of IronSide Secure Enclave, which is the new name of IronSide Secure Element.