[SPIR-V] Support SPV_INTEL_arbitrary_precision_integers extension#250

michalpaszkowski wants to merge 3 commits intofeature/spirv-backend-llvm15_0_7KhronosGroup/LLVM-SPIRV-Backend:feature/spirv-backend-llvm15_0_7from

feature_SPV_INTEL_arbitrary_precision_integers_extensionKhronosGroup/LLVM-SPIRV-Backend:feature_SPV_INTEL_arbitrary_precision_integers_extensionCopy head branch name to clipboard