## 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
{"key": "$geoip_country_name", "type": "person", "value": ["france"], "operator": "exact"}
                        
                    ],
                },
            },
        )
        id = creation_response.json()["id"]
        response = self.client.get(f"/api/projects/{self.team.id}/experiments/{id}/results")
        self.assertEqual(200, response.status_code)
        response_data = response.json()
        result = sorted(response_data["insight"], key=lambda x: x["breakdown_value"])
        self.assertEqual(result[0]["count"], 4)
        self.assertEqual("control", result[0]["breakdown_value"])
        self.assertEqual(result[1]["count"], 5)
        self.assertEqual("test", result[1]["breakdown_value"])
        
        
        self.assertAlmostEqual(response_data["probability"]["test"], 0.923, places=2)
        self.assertFalse(response_data["significant"])
    @snapshot_clickhouse_queries
    def test_experiment_flow_with_event_results_for_three_test_variants(self):
        journeys_for(
            {
                "person1_2": [
                    {"event": "$pageview1", "timestamp": "2020-01-02", "properties": {"$feature/a-b-test": "test_2"},},
                ],
                "person1_1": [
                    {"event": "$pageview1", "timestamp": "2020-01-02", "properties": {"$feature/a-b-test": "test_1"},},
                ],
                "person2_1": [