[clang] [Clang][Sema] Account for types coming from template parameter when diagnosing mem initializer order issues (PR #201586)

[Gábor Spaits via cfe-commits]

spaits wrote:

Thanks @zwuis for your input. I have reopened #201379. Now the tests are passing there. There we are reporting this as error.

https://github.com/llvm/llvm-project/pull/201586