microsoft/compiler: Support DXIL validator version 1.5

This version of the validator starts adding usage masks into
the DXIL, which then are expected to match the PSV and signature
data. The usage masks are "correct" meaning that the never-writes
mask no longer includes bits outside of components 0-3.

A future change will actually compute useful masks.

Reviewed-by: Enrico Galli <enrico.galli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17603>
2 files changed