Fix max_page_size parameter on get_previously_aggregated_workflow_ids method of Aggregator class

[kheal]

Dependent on addressing microbiomedata/nmdc-runtime#797 .

See #FIXME tag in generate_metap_agg.py script. We should enable some pagination (once feasible) on the initial gathering of previously-aggregated workflow IDs.

Current:

        """Function to return all ids of workflow execution ids that have already been aggregated.

        Uses the aggregation_filter attribute to filter the results for subclasses.

        Returns
        -------
        list
            List of workflow ids that have already been aggregated
        """
        agg_col = self.get_results(
            collection="functional_annotation_agg",
            filter=self.aggregation_filter,
            #FIXME: Using max_page_size of 0 may not work as we scale up the functional_annotation_agg collection - see issue: 
            # https://github.com/microbiomedata/nmdc-runtime/issues/797
            max_page_size=0,
            fields="was_generated_by",
        )
        ids = list(set([x["was_generated_by"] for x in agg_col]))
        return ids

Desired:

        """Function to return all ids of workflow execution ids that have already been aggregated.

        Uses the aggregation_filter attribute to filter the results for subclasses.

        Returns
        -------
        list
            List of workflow ids that have already been aggregated
        """
        agg_col = self.get_results(
            collection="functional_annotation_agg",
            filter=self.aggregation_filter,
            max_page_size=1000,
            fields="was_generated_by",
        )
        ids = list(set([x["was_generated_by"] for x in agg_col]))
        return ids

[kheal]

This has been fixed!