Cleanup: CMake: Modernize bf_blenlib dependencies

Pretty straightforward

- Remove any blenlib paths from INC
- Add a dependency though LIB

Pull Request: https://projects.blender.org/blender/blender/pulls/109934

intern/memutil/CMakeLists.txt

@@ -5,7 +5,6 @@
 set(INC
   .
   ..
-  ../../source/blender/blenlib
 )
 
 set(INC_SYS
@@ -24,6 +23,7 @@ set(SRC
 )
 
 set(LIB
+  PRIVATE bf::blenlib
 )
 
 blender_add_lib(bf_intern_memutil "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")