Every driver wants the chance to see the default variant of the shader in
the hopes of avoiding draw-time shader compiles, even if they have some
NOS compiled into the shader by st/mesa. Before, every driver had to
avoid st/mesa lowering options to get this behavior, even if they would
like to have the shared lowering code, and some drivers were just missing
the behavior because nobody had debugged that it was missing yet.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8601>
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