🔨 Refactor Engine's predict method

[ashwinvaidya17]

What is the motivation for this task?

The predict method has the following signature

def predict(
        self,
        model: AnomalyModule | None = None,
        dataloaders: EVAL_DATALOADERS | AnomalibDataModule | None = None,
        datamodule: AnomalibDataModule | Dataset | PredictDataset | None = None,
        return_predictions: bool | None = None,
        ckpt_path: str | None = None,
    ) -> _PREDICT_OUTPUT | None:

This is confusing as data loader and data module accept data module and dataset as parameters interchangeably.
Ideally dataset can be another parameter that contains only PredictDataset as input.

Describe the solution you'd like

The solution will require changes to cli.py as well.

Additional context

No response