This PR introduced some filters to improve the workflow when using
shader_builder. Shader builder is used to validate shader compilation
during buildtime and can be enabled using `WITH_GPU_BUILDTIME_SHADER_BUILDER`.
During backend development shader builder is also handy as you can
pin-point it to the shader/backend you're focusing on. Without filters
you would insert temporary code to break on a specific shader.
* `--gpu-backend` can be used to only check a specific backend.
possible values are `vulkan`, `metal` or `opengl`. When argument
isn't passed, all backends will be validated.
* `--gpu-shader-filter` can be used to only check a subset or indivisual
shader. The filter is a name starts with filter. Use
`--gpu-shader-filter eevee` to validate all eevee shaders
Pull Request: https://projects.blender.org/blender/blender/pulls/115888
1b99987043