[clang] [APINotes] Upstream Sema logic to apply API Notes to decls (PR #73017)

[Egor Zhdan via cfe-commits]

egorzhdan wrote:

> Do we want to submit the first three in the series and then take on the topmost commit?

Sounds good, let me remove the 4th commit from this PR

https://github.com/llvm/llvm-project/pull/73017