[clang] [clang-tools-extra] [clang] Extend diagnose_if to accept more detailed warning information (PR #70976)

[Aaron Ballman via cfe-commits]

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@@ -33,14 +33,14 @@ CXDiagnosticSeverity CXStoredDiagnostic::getSeverity() const {
     case DiagnosticsEngine::Error:   return CXDiagnostic_Error;
     case DiagnosticsEngine::Fatal:   return CXDiagnostic_Fatal;
   }
-  
+
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AaronBallman wrote:

A lot of unrelated formatting changes (feel free to land as NFC and rebase on top of it if you want, but this keeps blames cleaner).

https://github.com/llvm/llvm-project/pull/70976