## 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
},
                ],
                
                "person_out_of_control": [{"event": "$pageview1", "timestamp": "2020-01-03",},],
                "person_out_of_end_date": [
                    {"event": "$pageview1", "timestamp": "2020-08-03", "properties": {"$feature/a-b-test": "control"}},
                    {
                        "event": "$feature_flag_called",
                        "timestamp": "2020-08-02",
                        "properties": {"$feature_flag": "a-b-test", "$feature_flag_response": "control"},
                    },
                ],
            },
            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": {
                    "feature_flag_variants": [
                        {"key": "control", "name": "Control Group", "rollout_percentage": 33},
                        {"key": "test_1", "name": "Test Variant 1", "rollout_percentage": 33},
                        {"key": "test_2", "name": "Test Variant 2", "rollout_percentage": 34},