[SYCL] Replace direct builtins-side multi_ptr usage with forward-declaration#21687

koparasy wants to merge 4 commits intointel:syclintel/llvm:syclfrom

koparasy:compile-time/remove-multi-ptr-from-builtinskoparasy/llvm:compile-time/remove-multi-ptr-from-builtinsCopy head branch name to clipboard