build: Move CMAKE_SKIP_INSTALL_RPATH from CMake to Guix script

Remove CMAKE_SKIP_INSTALL_RPATH from CMakeLists.txt and add CMAKE_SKIP_RPATH to the Guix build script. This keeps build-environment-specific settings in the build scripts rather than hardcoded in the CMake configuration.

CMakeLists.txt

@@ -630,7 +630,6 @@ if(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
   set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 else()
   set(CMAKE_SKIP_BUILD_RPATH TRUE)
-  set(CMAKE_SKIP_INSTALL_RPATH TRUE)
 endif()
 add_subdirectory(test)
 add_subdirectory(doc)