[Headers][X86] VectorExprEvaluator::VisitCallExpr - allow SSE/AVX2/AVX512 pack intrinsics to be used in constexpr#156003

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

woruyu:fix/allow-SSE-AVX2-AVX512-pack-intrinsics-use-constexprworuyu/llvm-project:fix/allow-SSE-AVX2-AVX512-pack-intrinsics-use-constexprCopy head branch name to clipboard