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

[Aaron Ballman via cfe-commits]

================
@@ -200,7 +273,33 @@ class DiagnosticIDs : public RefCountedBase<DiagnosticIDs> {
   // FIXME: Replace this function with a create-only facilty like
   // createCustomDiagIDFromFormatString() to enforce safe usage. At the time of
   // writing, nearly all callers of this function were invalid.
-  unsigned getCustomDiagID(Level L, StringRef FormatString);
+  unsigned getCustomDiagID(CustomDiagDesc Diag);
+
+  [[deprecated("Use a CustomDiagDesc instead of a Level")]] unsigned
----------------
AaronBallman wrote:

Similar concerns here about `-Werror` builds. Also, did clang-format cause this to be so horribly formatted?

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