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intel/brw/xe2+: Do not use $.dst or $.src SWSB annotations in SENDs

Caio Oliveira requested to merge cmarcelo/mesa:push-trtvwqxkyqqk into main

When a SEND instruction is a EOT, the scoreboard lowering will not allocate a new SBID for it, since nothing needs to wait for it. In Gfx12 this allowed the SEND to get out-of-order $.dst or $.src dependencies.

Starting on Xe2+ this is not supported anymore, in favor of supporting more combined modes.

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