[clang] [analyzer] Discard non-live source frames from the current stack (PR #213779)

[via cfe-commits]

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@@ -89,6 +94,7 @@ static ProgramStateRef bindSource(ProgramStateRef State, SVal RetVal,
   LifetimeSourceSet Set = LSet ? *LSet : F.getEmptySet();
   Set = F.add(Set, Source);
   State = State->set<LifetimeBoundMap>(RetVal, Set);
+
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isuckatcs wrote:

Nit: unrelated change, please remove

https://github.com/llvm/llvm-project/pull/213779