## 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)`.

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posthog/queries/trends/breakdown.py
)
            time_range = enumerate_time_range(self.filter, seconds_in_interval)
            return (
                content_sql,
                self.params,
                self._parse_single_aggregate_result(self.filter, self.entity, {"days": time_range}),
            )
        else:
            breakdown_filter = breakdown_filter.format(**breakdown_filter_params)
            if self.entity.math in [WEEKLY_ACTIVE, MONTHLY_ACTIVE]:
                active_user_format_params, active_user_query_params = get_active_user_params(
                    self.filter, self.entity, self.team_id
                )
                self.params.update(active_user_query_params)
                conditions = BREAKDOWN_ACTIVE_USER_CONDITIONS_SQL.format(
                    **breakdown_filter_params, **active_user_format_params
                )
                inner_sql = BREAKDOWN_ACTIVE_USER_INNER_SQL.format(
                    breakdown_filter=breakdown_filter,
                    person_join=person_join_condition,
                    groups_join=groups_join_condition,
                    sessions_join=sessions_join_condition,
                    person_id_alias=self.DISTINCT_ID_TABLE_ALIAS if not self.using_person_on_events else "e",
                    aggregate_operation=aggregate_operation,
                    interval_annotation=interval_annotation,
                    breakdown_value=breakdown_value,
                    conditions=conditions,
                    GET_TEAM_PERSON_DISTINCT_IDS=get_team_distinct_ids_query(self.team_id),
                    **active_user_format_params,
                    **breakdown_filter_params,