This patch adds support for passes in the new CPU compositor. This
involves rewriting the get_input_texture method into a get_pass methods
that returns a result as opposed to a texture. The result wraps the
cached GPU texture or image buffer depending on the execution device.
The Render Layers node was implemented for CPU execution and a new
utility constructor for the result class was added to determine type and
precision based on GPU texture format. The fallback depth pass that was
retrieved from the viewport frame buffer was removed, as it was a hack
that can no longer be supported due to the use of stencil format.
Pull Request: https://projects.blender.org/blender/blender/pulls/129154
8a33962357