[libcxx-commits] [libcxx] [libc++][NFC] Use __construct_at and __destroy_at instead of using preprocessor conditionals (PR #70866)

[Louis Dionne via libcxx-commits]

ldionne wrote:

@EricWF This is essentially a small simplification of the code -- we have to use construct_at and destroy_at for constexpr-friendliness, and we also like to do it for consistency everywhere. So this really just trades `#if` for an unconditional call to something that does the right thing under the hood, so I'd go ahead with this change.

https://github.com/llvm/llvm-project/pull/70866