[LoadStoreToLLVM] Refactor the 2D block load lowering.#4615

chengjunlu wants to merge 2 commits intomainintel/intel-xpu-backend-for-triton:mainfrom

chengjun/refactor_block_io_loadintel/intel-xpu-backend-for-triton:chengjun/refactor_block_io_loadCopy head branch name to clipboard