[clang] [Clang] Treat address-of template substitution as SFINAE (PR #208062)

[Erich Keane via cfe-commits]

erichkeane wrote:

> Added a release note. `LCOMPILER-2423` is an AMD internal issue ID, similar to Apple’s `rdar` references.

Can we just remove it please?  We tolerate Apple's radr links for historical reasons (and frankly, I don't really), but I very much don't want our commit messages to start having everyone's internal bug tracker IDs in it.  So let us not set the precedence here.

https://github.com/llvm/llvm-project/pull/208062