[clang] [APINotes] Match function-like Where.Parameters in Sema (PR #205307)

[John Hui via cfe-commits]

================
@@ -1024,10 +1105,21 @@ void Sema::ProcessAPINotes(Decl *D) {
     // Global functions.
     if (auto FD = dyn_cast<FunctionDecl>(D)) {
       if (FD->getDeclName().isIdentifier()) {
+        std::optional<SmallVector<SmallVector<std::string, 4>, 2>>
+            ParameterSelectorCandidates =
+                getAPINotesParameterSelectorCandidates(*this, FD);
----------------
j-hui wrote:

nit: this is a good place to use `auto`:

```suggestion
        auto ParameterSelectorCandidates =
            getAPINotesParameterSelectorCandidates(*this, FD);
```

This way you can tweak the `SmallVector` inline size at the function declaration without having to refactor all call sites.

https://github.com/llvm/llvm-project/pull/205307