[clang] [clang] Support `__is_trivially_copyable(int()&)==false` (PR #81298)

[Amirreza Ashouri via cfe-commits]

AMP999 wrote:

I don't know, but it seems to me that ideally the `DSC` here would be `DSC_template_type_arg`, not just `DSC_template_arg`. Is there a way to make that happen?

https://github.com/llvm/llvm-project/pull/81298