[clang] [Clang][ssaf] Add missing instantiations of `Registry<JSONFormat::FormatInfo>` (PR #181806)

[Balázs Benics via cfe-commits]

================
@@ -19,6 +20,9 @@ using Value = llvm::json::Value;
 // ErrorBuilder - Fluent API for constructing contextual errors.
 //----------------------------------------------------------------------------
 
+template class CLANG_EXPORT_TEMPLATE
+    llvm::Registry<clang::ssaf::JSONFormat::FormatInfo>;
+
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steakhal wrote:

I think this one should be this:

```suggestion
LLVM_INSTANTIATE_REGISTRY(llvm::Registry<JSONFormat::FormatInfo>)
```

https://github.com/llvm/llvm-project/pull/181806