[clang] [analyzer] Implemented the DanglingPtrDeref checker to detect use-after-scope lifetime errors (PR #209278)

[Balázs Benics via cfe-commits]

================
@@ -55,6 +61,11 @@ std::vector<const MemRegion *> lifetime_modeling::getDanglingRegionsAfterReturn(
   return Regions;
 }
 
+bool lifetime_modeling::isDeallocated(ProgramStateRef State,
----------------
steakhal wrote:

To me it makes more sense this way. One if the checker that implements the freestanding API. It's just the naming conventions are different for public APIs and checker implementations. I think it totally makes sense.

https://github.com/llvm/llvm-project/pull/209278