Previously all shaders had its own descriptor set layout handle. This makes it
difficult to see if currently bound resources can be reused when switching shaders.
To work around this limitation, the vulkan backend rebound the resources over
and over again.
This PR is part of the render graph where changing shaders can reuse previous
bound resources. This PR only makes sure that the layout handles are the same
so we can identify 'compatible' pipelines. The behavior to limit rebinding of
resources will be added as part of the render graph in a later commit.
Pull Request: https://projects.blender.org/blender/blender/pulls/120562
f789619e65