## Bug description

Monthly Active Users metric seems wrong when choosing "# Number" as chart type.

Number: 
![image](https://user-images.githubusercontent.com/513669/201980874-be7d9c0d-5c9c-4c1e-955c-ea4143c84061.png)

Line chart: 
![image](https://user-images.githubusercontent.com/513669/201980986-b17af929-84e5-4f6a-b7f8-23b7ac8bedbc.png)

**490 != 70**

## How to reproduce

1. Create a new insight using any event and the "Monthly active users" metric
2. Date range = This month + Grouped by = Day
3. Choose chart type as Number => remember value
4. Change chart type as Linear => check last data point

=> the 2 values do not match
=> in other words there's a diff between a total aggregation and an aggregation per bucket of time ?

## Environment

- [x] PostHog Cloud
posthog/queries/trends/trends_event_query.py
_entity: Entity
    _filter: Filter
    def __init__(self, entity: Entity, *args, **kwargs):
        self._entity = entity
        super().__init__(*args, **kwargs)
    def get_query(self) -> Tuple[str, Dict[str, Any]]:
        _fields = (
            f"{self.EVENT_TABLE_ALIAS}.timestamp as timestamp"
            + (
                " ".join(
                    f', {self.EVENT_TABLE_ALIAS}."{column_name}" as "{column_name}"'
                    for column_name in self._column_optimizer.event_columns_to_query
                )
            )
            + " ".join(
                [
                    ", "
                    + get_property_string_expr("events", property, f"'{property}'", "properties", table_alias="e")[0]
                    + f" as {property}"
                    for property in self._extra_event_properties
                ]
            )
            + (f", {self.DISTINCT_ID_TABLE_ALIAS}.person_id as person_id" if self._should_join_distinct_ids else "")
            + (
                f", {self.SESSION_TABLE_ALIAS}.session_duration as session_duration"