With RADV, when VS/TES and FS are compiled separately, the PrimitiveId
is exported unconditionally because it's not possible to know if the
FS reads it or not. This happens with fast-link GPL and shader object.
Though, the PrimitiveID should be ignored when it's implicitly exported
because otherwise the stream output LDS offset is incorrect.
This fixes a bunch of failures with transform feedback and Zink/RADV
when shader object is enabled on RDNA3.
Cc: mesa-stable
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27981>
d12984edb8