This feature greatly increase depth buffer precision.
This is very noticeable in large view distance scenes.
This is enabled by default on GPUs that supports it (most of the hardware we
support already supports this). This makes rendering different on the GPUs
that do not support that feature (`glClipControl`).
While this give much better depth precision as before, we also have a lot of
imprecision caused by our vertex transformations. This can be improved in
another task.
Pull Request: https://projects.blender.org/blender/blender/pulls/138898
ca88983af2