[clang] [clang][analyzer] Fix a nullptr dereference when -ftime-trace is used (Reland) (PR #139980)

[Fangyi Zhou via cfe-commits]

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@@ -100,41 +100,7 @@ class SymbolConjured : public SymbolData {
   ConstCFGElementRef getCFGElementRef() const { return Elem; }
 
   // It might return null.
-  const Stmt *getStmt() const {
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fangyi-zhou wrote:

moved this out of the header file because I feel like this is getting too big to be included in the header, let me know if you agree

https://github.com/llvm/llvm-project/pull/139980