[clang] [Clang] Instantiate constexpr function when they are needed. (PR #173537)

[Corentin Jabot via cfe-commits]

cor3ntin wrote:

> There are #35052 and related issues. Are they fixed now?

Thanks for letting me know about these.  They are fixed, I added tests

https://github.com/llvm/llvm-project/pull/173537