anv: Properly alloc buffers that will be promoted to framebuffer in Xe KMD

anv: Properly alloc buffers that will be promoted to framebuffer in Xe KMD

Xe KMD does a special caching handling for buffers that will be
scanout to display, so that is why it needs a flag set during
allocation.

Checking if VK_STRUCTURE_TYPE_WSI_MEMORY_ALLOCATE_INFO_MESA
is available in AllocateMemory() and marking the buffer as scanout.

All WSI code paths but one sets
VK_STRUCTURE_TYPE_WSI_MEMORY_ALLOCATE_INFO_MESA.
The only one that doesn't requires that WSI is initialize with
wsi_device_options.sw_device = true to be executed, what is not the
case for ANV.

Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21885>