vulkan/wsi/display: add option for display fence to signal syncobj
To avoid having a separate "wsi_fence" path in the driver, make it so wsi fences can signal a syncobj.
Used by turnip in !6683 (merged)
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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.
To avoid having a separate "wsi_fence" path in the driver, make it so wsi fences can signal a syncobj.
Used by turnip in !6683 (merged)