auto3dseg flexibility to override inference parameters for each model in the ensemble

[wyli]

Is your feature request related to a problem? Please describe.
it seems in the ensemble logic, pred_param should be given in a way that's compatible with all the models participating in the inference.

MONAI/monai/apps/auto3dseg/ensemble_builder.py

Lines 116 to 118 in eb6bbe8

	def __call__(self, pred_param: Optional[Dict[str, Any]] = None):
	"""
	Use the ensembled model to predict result.

would be great to revise the following logic to support model-specific params as well.

MONAI/monai/apps/auto3dseg/ensemble_builder.py

Lines 158 to 161 in eb6bbe8

	for algo in self.algo_ensemble:
	infer_instance = algo[AlgoEnsembleKeys.ALGO]
	pred = infer_instance.predict(predict_files=[file], predict_params=param)
	preds.append(pred[0])