## Bug description

When calculating Trends results with an aggregated (e.g. single output, like big number) display type, WAU/MAU don't work. This is because we have an `ACTIVE_USERS_SQL` query for time series display types, but we don't have a version of this for aggregated display types. (See ZEN-1043.)

## How to reproduce

1. Create an insight with a single WAU or MAU series.
2. Switch display type to "Number".
3. Open the "Debug ClickHouse queries" modal from the command palette.
4. See `COUNT(*)` instead of `COUNT(DISTINCT person_id)`.

#### *Thank you* for your bug report – we love squashing them!

posthog/queries/trends/breakdown.py
"aggregated_value": aggregated_value,
                    "filter": filter_params,
                    "persons": {
                        "filter": extra_params,
                        "url": f"api/projects/{self.team_id}/persons/trends/?{urllib.parse.urlencode(parsed_params)}",
                    },
                    **result_descriptors,
                    **additional_values,
                }
                parsed_results.append(parsed_result)
            return sorted(parsed_results, key=lambda x: self.breakdown_sort_function(x))
        return _parse
    def _parse_trend_result(self, filter: Filter, entity: Entity) -> Callable:
        def _parse(result: List) -> List:
            parsed_results = []
            for stats in result:
                result_descriptors = self._breakdown_result_descriptors(stats[2], filter, entity)
                parsed_result = parse_response(stats, filter, additional_values=result_descriptors)
                parsed_result.update(
                    {
                        "persons_urls": self._get_persons_url(
                            filter, entity, self.team_id, stats[0], result_descriptors["breakdown_value"]
                        )
                    }
                )
                parsed_results.append(parsed_result)
                parsed_result.update({"filter": filter.to_dict()})
            return sorted(parsed_results, key=lambda x: self.breakdown_sort_function(x))
        return _parse
    def _get_persons_url(