[clang] [clang] CTAD: implement the missing IsDeducible constraint for alias templates (PR #89358)

[Haojian Wu via cfe-commits]

hokein wrote:

> Needs a release note, and I think we actually DO have to do those diagnostics here.

Added a release note for the new builtin.


https://github.com/llvm/llvm-project/pull/89358