[clang] [llvm] [clang][ssaf] Fix instantiations of `Registry<TUSummaryExtractor, TUSummaryBuilder &>` (PR #176730)

[Tomohiro Kashiwada via cfe-commits]

kikairoya wrote:

Added a mention of the new checks in the description.

CI seems happy. Could you push the merge button? Thanks in advance.

https://github.com/llvm/llvm-project/pull/176730