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

[via cfe-commits]

github-actions[bot] wrote:

<!--LLVM CODE LINT COMMENT: clang-tidy-->


:warning: C/C++ code linter, clang-tidy found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

```bash

git diff -U0 origin/main...HEAD -- clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp |
python3 clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py   -path build -p1 -quiet
```

</details>

<details>
<summary>
View the output from clang-tidy here.
</summary>

```
clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp:1399:63: error: use of undeclared identifier 'ConfigLoc' [clang-diagnostic-error]
 1399 |   const FileStyle &FileStyle = getStyleForFile(SM.getFilename(ConfigLoc));
      |                                                               ^~~~~~~~~
```

</details>


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