📡 ☎️ Fix kwargs transmission on MultiTrainingCallback

[Rodrigo-A-Pereira]

Link to the relevant Bug(s)

This PR is linked to a bug found in a discussion on issue #643 (comment).

Description of the Change

Pass the kwargsto the registered callbacks when they are called by the MultiTrainingCallback object

Example:

   def post_epoch(self, epoch: int, epoch_loss: float, **kwargs: Any) -> None:  # noqa: D102
        for callback in self.callbacks:
            callback.post_epoch(epoch=epoch, epoch_loss=epoch_loss, **kwargs)

Possible Drawbacks

None I can think of.

Verification Process

I verified that the given kwargs were being indeed passed down, by printing the kwargs inside the registered callback function being called.

Release Notes

Fixed issue where kwargs were not being transmitted from MultiTrainingCallback object to its registered callbacks.

[cthoyt]

Excellent! Thanks @Rodrigo-A-Pereira for looking into this.

[cthoyt]

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