[clang] [APINotes] Upstream Sema logic to apply API Notes to decls (PR #78445)

[Arthur Eubanks via cfe-commits]

aeubanks wrote:

> Oh, thanks @nikic for that data point. Let me try to avoid the overhead, I'll put up a patch tomorrow morning.

Did this ever happen?

https://github.com/llvm/llvm-project/pull/78445