[clang] [LifetimeSafety] Introduce buildOriginFlowChain for use-after-scope (PR #199345)

[Utkarsh Saxena via cfe-commits]

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@@ -54,14 +54,24 @@ inline bool IsLifetimeSafetyEnabled(Sema &S, const Decl *D) {
   return false;
 }
 
+inline StringRef formatExpr(const Expr *E) {
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usx95 wrote:

cc: @Nekon69

https://github.com/llvm/llvm-project/pull/199345