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zink: reject Imagination proprietary driver w/o geometryShader

Icenowy Zheng requested to merge icenowy/mesa:zink-rej-img-rogue into main 
zink: reject Imagination proprietary driver w/o geometryShader

On some low-end GPUs (e.g. BXE/BXM series), the Imagination proprietary
Vulkan driver do not implement geometryShader feature, which is required
by Zink currently to smoothen lines. In addition, these vulkan drivers
shipped are usually not robust enough to run Zink at all, and
frequently fail with crashes.

Reject these drivers.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>

I'm not sure whether this commit should be backported to Mesa stable...

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