## Is your feature request related to a problem?

we currently run e2e tests with postgres backend, potentially causing us to miss bugs as we are deprecating Postgres (#6662)

## Describe the solution you'd like

Run e2e tests with clickhouse

## Describe alternatives you've considered



## Additional context

I'll pick this up tomorrow

#### *Thank you* for your feature request – we love each and every one!

posthog/tasks/test/test_calculate_event_property_usage.py
EventDefinition.objects.create(team=self.team, name="$pageview")
            EventDefinition.objects.create(team=self.team, name="custom event")
            PropertyDefinition.objects.create(team=self.team, name="$current_url")
            PropertyDefinition.objects.create(team=self.team, name="team_id")
            PropertyDefinition.objects.create(team=self.team, name="value")
            team2 = Organization.objects.bootstrap(None)[2]
            with freeze_time("2020-08-01"):
                
                Insight.objects.create(
                    team=self.team,
                    filters={
                        "events": [{"id": "$pageview"}],
                        "properties": [{"key": "$current_url", "value": "https://posthog.com"}],
                    },
                )
                create_event(
                    distinct_id="test",
                    team=self.team,
                    event="$pageview",
                    properties={"$current_url": "https://posthog.com"},
                )
            with freeze_time("2020-10-01"):