microsoft/compiler: Move workgroup_size lowering from clc

It doesn't depend on the clc data being provided externally, so no
need to tie it there, we can re-use it for GL and Vulkan compute.

Reviewed-by: Sil Vilerino <sivileri@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14367>
4 files changed