Add missing dependency group

[dakinggg]

The Composer mlflow dependency group contains more than just mlflow, so we need to install the whole dep group.

[snarayan21]

should we create a separate optional dep group in composer that contains only what foundry needs? or does foundry need all of the packages under 'mlflow'?

[dakinggg]

@snarayan21 foundry needs the whole dep group

[snarayan21]

lgtm then