[clang] [Clang] Fix immediate escalation of template function specializations. (PR #124404)

[Michael Buch via cfe-commits]

Michael137 wrote:

FYI, this is causing the LLDB `image dump ast` command to infinitely recurse when we have template functions in the AST. Not really super urgent because it's not a command most people use, and the root cause is probably due to the way LLDB constructs its AST. But thought I'd flag it here in case someone runs into this too

https://github.com/llvm/llvm-project/pull/124404