Tests: Convert CPackWiXGenerator to RunCMake.CPack_WIX
Create an alternative to the Tests/RunCMake/CPack infrastructure
that more closely follows the rest of RunCMake's conventions and
that is suitable for testing WiX.
Create an alternative to the Tests/RunCMake/CPack infrastructure
that more closely follows the rest of RunCMake's conventions and
that is suitable for testing WiX.