Merge pull request #83845 from charles-zablit/charles-zablit/demangling/make-printGenericSignature-virtual-to-6.2.1

🍒 [demangling] make printGenericSignature virtual

Author: adrian-prantl

include/swift/Demangling/Demangle.h

@@ -949,7 +949,7 @@ class NodePrinter {
 
   void printImplFunctionType(NodePointer fn, unsigned depth);
 
-  void printGenericSignature(NodePointer Node, unsigned depth);
+  virtual void printGenericSignature(NodePointer Node, unsigned depth);
 
   void printFunctionSigSpecializationParams(NodePointer Node, unsigned depth);