CMake: Add buildbot configuration for all platforms

It allows to more easily override cmake options which we want to
be enabled on the buildbot.

In a way it was possible to do via the pipeline config, but this
change provides a more natural way for Blender developers to set
CMake configuration which is to be enabled on buildbot, but not
on local developer machines.

Pull Request: https://projects.blender.org/blender/blender/pulls/124892

build_files/buildbot/config/blender_macos.cmake

@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2024 Blender Authors
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+include("${CMAKE_CURRENT_LIST_DIR}/../../cmake/config/blender_release.cmake")

build_files/buildbot/config/blender_windows.cmake

@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2024 Blender Authors
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+include("${CMAKE_CURRENT_LIST_DIR}/../../cmake/config/blender_release.cmake")