Ash 0.32.0: KHR Ray Tracing

Added

• Final KHR RayTracing support (VK_KHR_ray_tracing_pipeline, VK_KHR_ray_query and VK_KHR_acceleration_structure device extensions)
• VK_NV_device_diagnostics_config device extension
• VK_KHR_deferred_host_operations device extension
• Expose header version and extension spec version constants
• Provide Vulkan library loader from custom path

Changed

• Removed deprecated experimental VK_KHR_ray_tracing extension
• Update Vulkan-Headers to 1.2.168
• Update libloading from 0.6 to 0.7

Fixed

• Turn c_void-returning functions into Rust ()
• Use best guess for ggp extension types
• Use raw pointers to static-sized arrays in FFI signatures
• rename parameter of get_physical_device_surface_support