`<memory>`: noexcept strengthen `out_ptr` factory as well

The standard doesn't require the out_ptr_t c'tors to be noexcept:

explicit out_ptr_t(Smart& smart, Args... args);
[..]
[Note 2: The constructor is not noexcept to allow for a variety of non-terminating and safe implementation strategies. For example, an implementation can allocate a shared_ptr's internal node in the constructor and let implementation-defined exceptions escape safely. The destructor can then move the allocated control block in directly and avoid any other exceptions. — end note]

-- https://eel.is/c++draft/out.ptr.t#7

Due to its simplistic implementation, the STL decided to strengthen it: https://github.com/microsoft/STL/blob/b5df16a98934319e2e6864d6036cbe9cd9c74faf/stl/inc/memory#L4345-L4347

However, this has not been applied to the std::out_ptr factory: https://github.com/microsoft/STL/blob/b5df16a98934319e2e6864d6036cbe9cd9c74faf/stl/inc/memory#L4403-L4405

Has this simply been forgotten, or is there another reason?

Start in stl/inc/memory at the out_ptr_t constructor and std::out_ptr factory declarations linked in the issue. Compare their noexcept specifications with the cited standard wording and inspect existing out_ptr tests. Done means the reason for the differing specifications is established and the implementation or coverage reflects the decision.