CMake: Fix Compiling Shader Builder on macOS

Due to changes in the build environment shader_builder wasn't able to
compile on macOs. This patch reverts several recent changes to CMake files.

* dbb2844ed9
* 94817f64b9
* 1b6cd937ff

The idea is that in the near future shader_builder will run on the buildbot as
part of any regular build to ensure that changes to the CMake doesn't break
shader_builder and we only detect it after a few days.

Pull Request: https://projects.blender.org/blender/blender/pulls/115929

source/blender/python/intern/CMakeLists.txt

@@ -9,6 +9,7 @@ set(INC
   ../../blentranslation
   ../../editors/include
   ../../gpu
+  ../../imbuf
   ../../imbuf/intern/oiio
   ../../makesrna
   ../../windowmanager
@@ -123,7 +124,6 @@ set(LIB
   bf_editor_animation
   bf_editor_interface
   bf_editor_space_api
-  PRIVATE bf::imbuf
   PRIVATE bf::intern::clog
   PRIVATE bf::intern::guardedalloc
   PRIVATE bf::animrig