fix: update model.py to support callbacks for named_components

[moversekostas]

or add support for any torch module in the hierarchy or
add support specifically for named_components

[tzole1155]

Maybe it is better to follow a different logic and search for Callbacks within the different modules of the model (e.g. components. monads, objectives, monitors. etc.).

So if we want to search for Callbacks within the components:

for module in model.named_components.values():
  if isinstance(module, Callback):
     self.data.append(module)

[moversekostas]

self.data.extend((c for c in model.children() if isinstance(c, Callback))) is redundant and do not perform any valid operation. thus should be removed