[llvm] [llvm] Replace deprecated aligned_storage with aligned byte array (PR #94169)

[Marc Auberer via llvm-commits]

marcauberer wrote:

> Why? We are not even close to C++20?

As these are in headers, which are transitively included by users (which potentially use C++23). So they will get the deprecation warnings as well.

https://github.com/llvm/llvm-project/pull/94169