Draft: lvp: Bump minimum-maximum subgroup size to 32
Essentially all GPUs support this size, thus essentially all middleware assumes this size is usable. llvmpipe's code generation might not be optimal for it, but that's better than not working.
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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.
Essentially all GPUs support this size, thus essentially all middleware assumes this size is usable. llvmpipe's code generation might not be optimal for it, but that's better than not working.