Reland "[libc] add basic lifetime annotations for support data structures"#164013

SchrodingerZhu wants to merge 1 commit intomainllvm/llvm-project:mainfrom

revert-164012-revert-145933-libc/lifetime-preliminaryllvm/llvm-project:revert-164012-revert-145933-libc/lifetime-preliminaryCopy head branch name to clipboard