[clang] [analyzer][NFC] Add StackFrame parent-chain range helpers (PR #210938)

[Gábor Horváth via cfe-commits]

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@@ -103,6 +103,11 @@ class CheckerContext {
 
   const StackFrame *getStackFrame() const { return Pred->getStackFrame(); }
 
+  /// Iterates over the current stack frame and all of its ancestors.
+  llvm::iterator_range<StackFrame::parent_iterator> stackframes() const {
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Xazax-hun wrote:

Alternative name for your consideration (no strong preference): `callstack`.

https://github.com/llvm/llvm-project/pull/210938