[libc][workflow] improve ci coverage with windows-2025 and arm ubuntu#123745

SchrodingerZhu merged 6 commits intollvm:mainllvm/llvm-project:mainfrom

SchrodingerZhu:libc-workflow-win2025-linuxarmSchrodingerZhu/llvm-project:libc-workflow-win2025-linuxarmCopy head branch name to clipboard