lavapipe/turnip: update features.txt

cf src/gallium/frontends/lavapipe/lvp_extensions.py
   src/freedreno/vulkan/tu_extensions.py
3 jobs for !8593 with lavafeat in 2 minutes and 43 seconds (queued for 1 second)
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sanity

00:00:08

 
  Deploy
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test-docs-mr

00:02:07

 
  Success
passed #7337510
success

00:00:28