CLI11 parsing issue with `ManyValues`

[jherico]

several of the flags available for batch mode (--tag, --category) are marked with the ManyValues enum, but any attempt to start an application with multiple values for these fails at the argument parsing stage with an error that 1 value was expected but N were given. This happens regardless of whether the command is invoked as vulkan-samples batch --tags foo --tag bar or vulkan-samples batch --tags foo bar

This appears to be a bug in the wrapping code for the CLI11 library, where the code looking at the flags and translating them into CLI11 structures does nothing different for OneValue vs ManyValues