anv: Assert ray query BO actually exists

The crash will happen if the client tries to use ray queries without
enabling the KHR_ray_query extension. Add an assert to be able to catch
this sooner.

Signed-off-by: Sviatoslav Peleshko <sviatoslav.peleshko@globallogic.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30581>

src/intel/vulkan/anv_cmd_buffer.c

@@ -477,6 +477,7 @@ anv_cmd_buffer_set_ray_query_buffer(struct anv_cmd_buffer *cmd_buffer,
    }
 
    /* Add the HW buffer to the list of BO used. */
+   assert(device->ray_query_bo);
    anv_reloc_list_add_bo(cmd_buffer->batch.relocs,
                          device->ray_query_bo);