[clang-tools-extra] [clang-tidy] Fix identifier-naming style lookup in macro arguments (PR #206809)

[Baranov Victor via cfe-commits]

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@@ -1395,7 +1395,8 @@ IdentifierNamingCheck::getDeclFailureInfo(const NamedDecl *Decl,
     return std::nullopt;
 
   const SourceLocation Loc = Decl->getLocation();
-  const FileStyle &FileStyle = getStyleForFile(SM.getFilename(Loc));
+  const SourceLocation ConfigLoc = SM.getSpellingLoc(Loc);
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vbvictor wrote:

```suggestion
  const SourceLocation SpellingLoc = SM.getSpellingLoc(Loc);
```

https://github.com/llvm/llvm-project/pull/206809