Support for SPV_KHR_ray_tracing

[Azralee]

This extension seems unsupported at the moment, as attempting to dissassemble a SPIR-V binary with this extension will result in a failure:

Disassembling SPIR-V binary: F:\SteamLibrary\steamapps\common\Quake II RTX\baseq2\shader_vkpt\direct_lighting.rgen.khr.spv... failed.
Error: failed to disassemble SPIR-V binary file: F:\SteamLibrary\steamapps\common\Quake II RTX\baseq2\shader_vkpt\direct_lighting.rgen.khr.spv
SPIR-V disassembler error message:
error: 8: Invalid capability operand: 4479

This seems to stem from a too old SPIR-V disassembler version, as Nsight Graphics had a similar Error:
https://forums.developer.nvidia.com/t/nsight-cant-display-ray-tracing-shaders-that-use-the-khr-extension/164235