## Is your feature request related to a problem?

I want to run experiments on groups

## Describe the solution you'd like

Experiments support group target metrics, and the FF respects group selection.


## Describe alternatives you've considered

No groups :(

## Additional context



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

ee/clickhouse/views/test/test_clickhouse_experiments.py
{"event": "$pageleave", "timestamp": "2020-08-05", "properties": {"$feature/a-b-test": "control"}},
                ],
                
                "person4": [
                    {"event": "$pageview", "timestamp": "2020-01-03", "properties": {"$feature/a-b-test": "test"},},
                ],
                "person5": [
                    {"event": "$pageview", "timestamp": "2020-01-04", "properties": {"$feature/a-b-test": "test"},},
                ],
            },
            self.team,
        )
        ff_key = "a-b-test"
        
        response = self.client.post(
            f"/api/projects/{self.team.id}/experiments/",
            {
                "name": "Test Experiment",
                "description": "",
                "start_date": "2020-01-01T00:00",
                "end_date": "2020-01-06T00:00",
                "feature_flag_key": ff_key,
                "parameters": None,
                "filters": {
                    "insight": "funnels",
                    "events": [{"order": 0, "id": "$pageview"}, {"order": 1, "id": "$pageleave"}],
                    "properties": [
                        {"key": "$geoip_country_name", "type": "person", "value": ["france"], "operator": "exact"}
                        
                    ],