[Clang][CodeGen] Implement code generation for __builtin_infer_alloc_token()#156842

melver merged 23 commits intomainllvm/llvm-project:mainfrom

users/melver/spr/alloctoken-clang-implement-__builtin_alloc_token_infer-and-llvmalloctokenidllvm/llvm-project:users/melver/spr/alloctoken-clang-implement-__builtin_alloc_token_infer-and-llvmalloctokenidCopy head branch name to clipboard