[freetype] Fix INTERFACE_LINK_LIBRARIES in exported cmake file

[JackBoosY]

Fix wrong INTERFACE_LINK_LIBRARIES in freetype-config.cmake:

set_target_properties(freetype PROPERTIES
  INTERFACE_INCLUDE_DIRECTORIES "${_IMPORT_PREFIX}/include;${_IMPORT_PREFIX}/include/freetype"
  INTERFACE_LINK_LIBRARIES "/mnt/d/xlinux/installed/x64-linux/debug/lib/libz.a;\$<\$<NOT:\$<CONFIG:DEBUG>>:/mnt/d/xlinux/installed/x64-linux/lib/libbz2.a>;\$<\$<CONFIG:DEBUG>:/mnt/d/xlinux/installed/x64-linux/debug/lib/libbz2d.a>;\$<\$<NOT:\$<CONFIG:DEBUG>>:/mnt/d/xlinux/installed/x64-linux/debug/lib/libpng.a>;\$<\$<CONFIG:DEBUG>:/mnt/d/xlinux/installed/x64-linux/debug/lib/libpng16d.a>;/mnt/d/xlinux/installed/x64-linux/debug/lib/libz.a"
)

Fixes #9952.

[Neumann-A]

${ZLIB_LIBRARIES} is correct, but it's value is not optimized;...;debug;..., so different values are generated in INTERFACE_LINK_LIBRARIES in freetype-config.cmake, and vcpkg_fixup_cmake_targets deletes the debug freetype-config.cmake, which causes this problem.
We should avoid using the macros provided by cmake's module.

That means ZLIB requires a wrapper to correctly set that value on Linux. You are just dropping a droplet of water on a hot stone with that patch. You might have fixed freetype but all other ports using ZLIB_LIBRARIES still have the same problem. The root cause ist that ZLIB_LIBRARIES is not correctly set with debug/optimized keywords and needs fixing on Linux/OSX.

[JackBoosY]

${ZLIB_LIBRARIES} is correct, but it's value is not optimized;...;debug;..., so different values are generated in INTERFACE_LINK_LIBRARIES in freetype-config.cmake, and vcpkg_fixup_cmake_targets deletes the debug freetype-config.cmake, which causes this problem.
We should avoid using the macros provided by cmake's module.

That means ZLIB requires a wrapper to correctly set that value on Linux. You are just dropping a droplet of water on a hot stone with that patch. You might have fixed freetype but all other ports using ZLIB_LIBRARIES still have the same problem. The root cause ist that ZLIB_LIBRARIES is not correctly set with debug/optimized keywords and needs fixing on Linux/OSX.

This means that all module modes(Find*.cmake) that call cmake by default have a high probability of this problem. So I think we should deal with it uniformly (by vcpkg, not by port).

[strega-nil]

Merged as "makes the experience better, but it'd be great to fix the underlying issues"

[JackBoosY]

In order to prevent this from happening, we at least need to find in POST_CHECK whether there is a release version of the library in *config.cmake / *targets.cmake.