[clang] [clang][Sema] Check swift_attr argument count in type contexts (PR #228873)

[Ambrose Leeb via cfe-commits]

Sirraide wrote:

> he original review that introduced `checkCommonAttributeFeatures()`

Actually, I think that's the wrong one; that's the review for the commit that I found via git blame, which is just the one that most recently updated `checkCommonAttributeFeatures()`

https://github.com/llvm/llvm-project/pull/228873