[clang] [clang][C23] Claim N3030 Enhancements to Enumerations supported (PR #107260)

[Aaron Ballman via cfe-commits]

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+// RUN: %clang_cc1 -verify -triple x86_64-unknown-linux-gnu -fsyntax-only --embed-dir=%S/Inputs -std=c23 %s -pedantic -Wall
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AaronBallman wrote:

```suggestion
// RUN: %clang_cc1 -verify -triple x86_64-unknown-linux-gnu -fsyntax-only -std=c23 %s -pedantic -Wall
```

https://github.com/llvm/llvm-project/pull/107260