vulkan/wsi: warn about unset present_mode in PresentModeCompatibilityExt

vulkan/wsi: warn about unset present_mode in PresentModeCompatibilityExt

A bug in vulkan tools, https://github.com/KhronosGroup/Vulkan-Tools/issues/846
causes vulkaninfo to crash in Mesa under wayland since the changes
in 5ceba97c

Handle the crashing case on wayland similarly to how other WSIs
do (nonsensically claiming a single compatible mode), and log
the condition once for all WSIs.

Fixes 5ceba97c2

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24888>