[clang] [LifetimeSafety] Run analysis in post-order of CallGraph for better annotation propagation (PR #174178)

[Utkarsh Saxena via cfe-commits]

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@@ -218,8 +217,8 @@ namespace incorrect_order_inference_object {
 MyObj* return_object_callee(MyObj* a);
 
 // FIXME: No lifetime annotation suggestion warning when functions are not present in the callee-before-caller pattern
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usx95 wrote:

nit: remove FIXME.

https://github.com/llvm/llvm-project/pull/174178