CMake: revert last weeks modernizations

The cleanup of blenkernel last weeks , caused the house of cards to
collapse on  top of bf_gpu's shader_builder, which is off by default
but used on a daily basis by the rendering team.

Given the fixes forward in #110394 ran into a ODR violation in OSL that
was hiding there for years, I don't see another way forward without
impeding the rendering teams productivity for "quite a while" as there
is no guarantee the OSL issue would be the end of it.

the only way forward appears to be back.

this reverts :

19422044ed
a670b53abe
0f541db97c
be516e8c81
3e88a2f44c
4e64b772f5
9547e7a317
07fe6c5a57

The problematic commit was 07fe6c5a57
as blenkernel links most of blender, it's a bit of a link order issue
magnet. Given all these commits stack, it's near impossible to revert
just that one without spending a significant amount of time resolving
merge conflicts. 99% of that work was automated, so easier to just
revert all of them, and re-do the work, than it is to deal with the
merge conflicts.

Pull Request: https://projects.blender.org/blender/blender/pulls/110438

intern/clog/CMakeLists.txt

@@ -3,7 +3,8 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 set(INC
-  PUBLIC .
+  .
+  ../atomic
 )
 
 set(INC_SYS
@@ -18,12 +19,9 @@ set(SRC
 
 set(LIB
   PRIVATE bf::intern::guardedalloc
-  PRIVATE bf::intern::atomic
 )
 
-blender_add_lib(bf_intern_clog "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")
-
 # Disabled for makesdna/makesrna.
-target_compile_definitions(bf_intern_clog PRIVATE WITH_CLOG_PTHREADS)
+add_definitions(-DWITH_CLOG_PTHREADS)
 
-add_library(bf::intern::clog ALIAS bf_intern_clog)
+blender_add_lib(bf_intern_clog "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")