Merge pull request #83375 from charles-zablit/charles-zablit/demangling/make-printGenericSignature-virtual

[demangling] make printGenericSignature virtual

Author: charles-zablit

include/swift/Demangling/Demangle.h

@@ -968,7 +968,7 @@ 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);