Normally Venus on Nvidia GPUs takes the prime blit path. The exception
is when KWin or any wlroots based compositors are used:
1. KWin and wlroots based compositors always add LINEAR to dmabuf
feedback tranches assuming LINEAR can be handled by GPU drivers.
2. Venus + Virgl only sees the compositor injected LINEAR mod since
Virgl doesn't support explicit modifiers on the driver side.
3. Nvidia GPUs doesn't support LINEAR color attachment, and it's too
late to reject LINEAR mod when the native image path has already
been taken instead of the prime image path.
Gamescope requires VK_EXT_physical_device_drm and its runtime doesn't
use standard WSI extensions, so venus can spoof without impacting it.
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40339>
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