[clang] [Clang][Sema] Implement approved resolution for CWG2858 (PR #88042)

[Krystian Stasiowski via cfe-commits]

sdkrystian wrote:

@Endilll I ran `make_cxx_dr_status` with the index from the WG21 wiki... should I drop the commit?

https://github.com/llvm/llvm-project/pull/88042