Do not check access when register button click

e6c72b1f23e7 missed to add the decorator on the register method.

Closes #14060

trytond/trytond/ir/model.py

@@ -1203,6 +1203,7 @@ class ModelButtonClick(DeactivableMixin, ModelSQL, ModelView):
                 })
 
     @classmethod
+    @without_check_access
     def register(cls, model, name, records):
         pool = Pool()
         Button = pool.get('ir.model.button')