Multi Krum Function
Here's how to use the Multi Krum function:
                # Import the library
                import charisius
                # Initialize aggregator and vectors
                aggregator = ...
                vectors = [...]
                # Call multi_krum function
                result = charisius.multi_krum(aggregator, vectors)
                
                Inputs
aggregator: object - The aggregator object containing the 'nb_byz' property.vectors: list - The list of PyTorch Tensors to be processed.
Outputs
result: torch.Tensor - The average of the k vectors with lowest scores.