## 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/test/test_trends.py
GroupTypeMapping.objects.create(team=self.team, group_type="organization", group_type_index=0)
        GroupTypeMapping.objects.create(team=self.team, group_type="company", group_type_index=1)
        create_group(team_id=self.team.pk, group_type_index=0, group_key="org:5", properties={"industry": "finance"})
        create_group(team_id=self.team.pk, group_type_index=0, group_key="org:6", properties={"industry": "technology"})
        create_group(team_id=self.team.pk, group_type_index=0, group_key="org:7", properties={"industry": "finance"})
        create_group(
            team_id=self.team.pk, group_type_index=1, group_key="company:10", properties={"industry": "finance"}
        )
    # TO
    def test_breakdown_with_filter_groups(self):