lavapipe fixes
This is a bunch of fixes and improvments for lavapipe CTS tests and vulkan demos.
The last two patches are just some refactoring from the CL tree that made sense to pull into vulkan here.
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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
This is a bunch of fixes and improvments for lavapipe CTS tests and vulkan demos.
The last two patches are just some refactoring from the CL tree that made sense to pull into vulkan here.