[clang] [APINotes] Parse function-like Where.Parameters (PR #203227)

[Gábor Horváth via cfe-commits]

================
@@ -338,8 +338,15 @@ template <> struct MappingTraits<Class> {
 } // namespace llvm
 
 namespace {
+typedef std::vector<StringRef> WhereParamsSeq;
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Xazax-hun wrote:

Nit: prefer `using` over `typedef`

```suggestion
using WhereParamsSeq = std::vector<StringRef>;
```

https://github.com/llvm/llvm-project/pull/203227