[NFC][analyzer] Fix static analyzer concerns

[Fznamznon]

Summary

CFGStmtMap frees resources in the destructor but doesn't
have user-written copy c'tor or assignment operator, so copying it using
default ones can cause double free.

[Fznamznon]

Rebase to maybe pass precommit

[cor3ntin]

LGTM

[Fznamznon]

The failures are unrelated.

clang/include/clang/Analysis/CFGStmtMap.h

 class ParentMap;
 class Stmt;
 
 class CFGStmtMap {
   ParentMap *PM;
   void *M;
 
   CFGStmtMap(ParentMap *pm, void *m) : PM(pm), M(m) {}
+  CFGStmtMap(const CFGStmtMap &) = delete;
+  CFGStmtMap &operator=(const CFGStmtMap &) = delete;
 
 public:
   ~CFGStmtMap();
 
   /// Returns a new CFGMap for the given CFG.  It is the caller's
   /// responsibility to 'delete' this object when done using it.
   static CFGStmtMap *Build(CFG* C, ParentMap *PM);