vcpkg hwloc + linking it statically makes it install hwloc files among umf

[lukaszstolarczuk]

When hwloc is installed on Windows via vcpkg and we enable UMF_LINK_HWLOC_STATICALLY=ON hwloc files (headers, etc.) are installed along our library.

Reproduction steps:

vcpkg install # all dependencies defined in our repo will be installed

mkdir build && cd build
cmake .. -DUMF_LINK_HWLOC_STATICALLY=ON
make install

We should check if this is an issue in our installation steps or perhaps missing a flag in vcpkg installation of hwloc or... something else 😉

Priority: low
// found on my testing branch