[clang] [LifetimeSafety] Track origins through std::function (PR #191123)

[Zhijie Wang via cfe-commits]

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@@ -316,6 +319,22 @@ class TestPointFact : public Fact {
             const OriginManager &) const override;
 };
 
+class KillOriginFact : public Fact {
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aeft wrote:

Done. I omitted it before because it overlaps with the comment for `Kind::KillOrigin`.

https://github.com/llvm/llvm-project/pull/191123