Changed CMAKE_INSTALL_FULL_<dir> to CMAKE_INSTALL_<dir>

[abussy-aldebaran]

See CMake documentation:
https://cmake.org/cmake/help/latest/module/GNUInstallDirs.html

These variables shouldn't be used in install() commands as they do not work with the cmake --install command's --prefix option, or with the cpack installer generators.

In pratice, this caused wrong IMPORTED_LOCATION_ in the generated proxsuite-nlpTargets-release.cmake, e.g.

set_target_properties(proxsuite-nlp::proxsuite-nlp PROPERTIES
  IMPORTED_LOCATION_RELEASE "/usr/lib/libproxsuite-nlp.so.0.10.0"
  IMPORTED_SONAME_RELEASE "libproxsuite-nlp.so.0.10.0"
  )

instead of

set_target_properties(proxsuite-nlp::proxsuite-nlp PROPERTIES
  IMPORTED_LOCATION_RELEASE "${_IMPORT_PREFIX}/lib/libproxsuite-nlp.so.0.10.0"
  IMPORTED_SONAME_RELEASE "libproxsuite-nlp.so.0.10.0"
  )

[nim65s]

thanks

[ManifoldFR]

Thanks @abussy-aldebaran ! I'll make an official v0.10.1 release with this patch and the other changes since November.