P3475R2 Deprecate `memory_order::consume`

WG21-P3475R2 Deprecate memory_order::consume

This is a Core paper with Library impact, but the library changes don't depend on compiler changes.

No feature-test macro is mentioned.

Note that the outright removal of [[carries_dependency]] means that we should drop our macroization defenses in: https://github.com/microsoft/STL/blob/d43d49a3fdfa9d4fdbafd82dc517250b93269c94/stl/inc/xkeycheck.h#L538-L542

Note: We are not yet accepting PRs for C++26 features.

(Feature-specific note: we should be able to accept a PR for this before accepting C++26 PRs generally. However, unlike C++26 papers that we've implemented unconditionally, this deprecation will actually need to be guarded by _HAS_CXX26. I updated the compiler and VCRuntime so we can distinguish C++23 from C++26, but still need to update the test matrices, which is a headache/distraction. The matrices need enough attention that I would prefer to tackle them personally.)

Start with the macroization defenses in stl/inc/xkeycheck.h at the referenced lines, then review the compiler and VCRuntime changes that distinguish C++23 from C++26. The work is done when memory_order::consume and [[carries_dependency]] reflect P3475R2 under _HAS_CXX26 and the affected test matrices are updated.