[clang] [clang-tools-extra] [Clang][Sema] fix deducing auto& from const int in template parameters is impossible in partial specializations (PR #79733)

[Qizhi Hu via cfe-commits]

jcsxky wrote:

> Oh wow, thanks for this fix! It will need a Changelog entry.
> 
> Does it fixes any of these issues? #68885

This patch can't fix #68885. I have looked into the code and the root cause maybe different (probably relate to ExprConst, I'm not sure). Need more work on that issue.

https://github.com/llvm/llvm-project/pull/79733