[llvm] [CodeGen] Port mir-debugify to new pass manager (PR #193201)

[via llvm-commits]

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@@ -97,6 +97,9 @@ LLVM_ABI bool checkDebugInfoMetadata(Module &M,
 /// Used to check whether we track synthetic or original debug info.
 enum class DebugifyMode { NoDebugify, SyntheticDebugInfo, OriginalDebugInfo };
 
+using DebugifyApplyToMFCallback = bool (*)(llvm::DIBuilder &, llvm::Function &,
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paperchalice wrote:

Use `std::function`?

https://github.com/llvm/llvm-project/pull/193201