[clang] [LifetimeSafety] Add warning for member functions returning field origins (PR #229784)

[Utkarsh Saxena via cfe-commits]

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@@ -744,6 +744,13 @@ Validates correct usage and adherence to lifetime safety annotations like [[clan
   }];
 }
 
+def LifetimeSafetyFieldOriginEscape
+    : DiagGroup<"lifetime-safety-field-origin-escape"> {
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usx95 wrote:

Added an experimental prefix.

https://github.com/llvm/llvm-project/pull/229784