GDScript: Cancel suspended functions when reloading a script

modules/gdscript/gdscript_function.h

@@ -616,6 +616,13 @@ public:
 	bool is_valid(bool p_extended_check = false) const;
 	Variant resume(const Variant &p_arg = Variant());
 
+#ifdef DEBUG_ENABLED
+	// Returns a human-readable representation of the function.
+	String get_readable_function() {
+		return state.function_name;
+	}
+#endif
+
 	void _clear_stack();
 	void _clear_connections();