## 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
self.team,
            event_table_alias="e",
            person_id_alias=f"person_id"
            if self.using_person_on_events
            else f"{self.DISTINCT_ID_TABLE_ALIAS}.person_id",
        )
        action_query = ""
        action_params: Dict = {}
        if self.entity.type == TREND_FILTER_TYPE_ACTIONS:
            action = self.entity.get_action()
            action_query, action_params = format_action_filter(
                team_id=self.team_id,
                action=action,
                table_name="e",
                person_properties_mode=self._person_properties_mode,
                person_id_joined_alias=f"{self.DISTINCT_ID_TABLE_ALIAS if not self.using_person_on_events else 'e'}.person_id",
            )
        self.params = {
            **self.params,
            **math_params,
            **prop_filter_params,
            **action_params,
            "event": self.entity.id,
            "key": self.filter.breakdown,
            **date_params,
            "timezone": self.team.timezone,
        }
        breakdown_filter_params = {
            "parsed_date_from": parsed_date_from,
            "parsed_date_to": parsed_date_to,