[Clang][NFC] Move HeadingAndSpellings to avoid copying#143611

shafik merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

shafik:clangAttrEmitterMoveOverCopygetallDriverDefinitions_bshafik/llvm-project:clangAttrEmitterMoveOverCopygetallDriverDefinitions_bCopy head branch name to clipboard