[SPIR-V] Add SPV_INTEL_2d_block_io extension#18433

YuriPlyakhin wants to merge 1 commit intointel:syclintel/llvm:syclfrom

YuriPlyakhin:SPV_INTEL_2d_block_ioYuriPlyakhin/llvm:SPV_INTEL_2d_block_ioCopy head branch name to clipboard