## 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
_create_person(team_id=self.team.pk, distinct_ids=["person1"], properties={"email": "test@posthog.com"})
        _create_person(team_id=self.team.pk, distinct_ids=["person2"], properties={"email": "test@gmail.com"})
        _create_person(team_id=self.team.pk, distinct_ids=["person3"], properties={})
        _create_event(event="sign up", distinct_id="person1", team=self.team, properties={"key": "val"})
        _create_event(event="sign up", distinct_id="person2", team=self.team, properties={"key": "val"})
        _create_event(event="sign up", distinct_id="person3", team=self.team, properties={"key": "val"})
        response = Trends().run(
            Filter(
                data={
                    "date_from": "-14d",
                    "breakdown": "email",
                    "breakdown_type": "person",
                    "events": [{"id": "sign up", "name": "sign up", "type": "events", "order": 0}],
                }
            ),
            self.team,
        )
        self.assertEqual(response[0]["label"], "sign up - none")
        self.assertEqual(response[1]["label"], "sign up - test@gmail.com")
        self.assertEqual(response[2]["label"], "sign up - test@posthog.com")
        self.assertEqual(response[0]["count"], 1)
        self.assertEqual(response[1]["count"], 1)
        self.assertEqual(response[2]["count"], 1)
    # 
    @test_with_materialized_columns(event_properties=["key"], person_properties=["email"])
    def test_breakdown_filtering_persons_with_action_props(self):