[clang] [Clang] allow [[msvc::constexpr]] usage outside the std namespace (PR #119153)

[Richard Dzenis via cfe-commits]

RIscRIpt wrote:

> allow [[msvc::constexpr]] usage outside the std namespace

By the way, to be precisely correct, these changes actually allow usage of "placement new" in `[[msvc::constexpr]]` context outside of the std namespace.



https://github.com/llvm/llvm-project/pull/119153