device_select: close dri3 fd after using it.
This can leak and causes crashes in some CTS test groups dEQP-VK.wsi.xcb.incremental_present*
Fixes: 9bc5b2d1 ("vulkan: add initial device selection layer. (v6.1)")
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This can leak and causes crashes in some CTS test groups dEQP-VK.wsi.xcb.incremental_present*
Fixes: 9bc5b2d1 ("vulkan: add initial device selection layer. (v6.1)")