Since macOS 12.0, the ``hdiutil udifrez`` and ``hdiutil udifderez``
commands to embed and extract resources in a disk image are deprecated.
The CPack DragNDrop Generator uses these to attach the SLA specified by
the `CPACK_RESOURCE_FILE_LICENSE` option. Since that option is shared
by multiple CPack generators, we cannot deprecate it. Instead, add an
explicit option to control the behavior. This will give projects a way
to package on future macOS versions that remove the commands.
In order to provide a long-term transition away from attaching SLAs to
disk images, update `cpack` to default this behavior to OFF. To retain
compatibility for CMake projects, teach the CPack module to default the
option to ON. Later a policy can be added to change the default.
Issue: #22978
9e38bfa915