LINK_LIBRARY and LINK_GROUP genexes should also be supported in INTERFACE_LINK_LIBRARIES_DIRECT
The docs for the $<LINK_LIBRARY:...>
and $<LINK_GROUP:...>
generator expressions state that they are only valid in the LINK_LIBRARIES
and INTERFACE_LINK_LIBRARIES
target properties. The new INTERFACE_LINK_LIBRARIES_DIRECT
property should also support these generator expressions. Either the docs are incorrect, or the missing support should be added.