[clang] [clang][sema] make sure arguments of __atomic_exchange complete type (PR #75135)

[via cfe-commits]

knightXun wrote:

> Why only `__atomic_exchange`? Presumably we need to be doing the same with every other of the atomic builtins as well (unless they already have this check and we only missed it on exchange?)

I agree! I will do this check on every other of the atomic builtins.

https://github.com/llvm/llvm-project/pull/75135