## Bug description

When filtering insights by active feature flags, and trying to select a single feature flag (by using a `contains` selector), events are not being correctly filter (i.e. no events are returned). This presumably happens because the `active_feature_flags` attribute is stored as an array and the operator does not work properly on CH.

## Expected behavior

Relevant events should be loaded.

## How to reproduce

1. Create an insights graph, filter by "Active feature flags" using a contain selector.

Alternatively, just open [this graph](https://app.posthog.com/insights?actions=%5B%7B%22id%22%3A1578%2C%22name%22%3A%22created%20action%22%2C%22type%22%3A%22actions%22%2C%22order%22%3A0%7D%5D&events=%5B%5D&new_entity=%5B%5D&interval=week&date_from=-90d&breakdown=false&breakdown_type&properties=%5B%7B%22key%22%3A%22%24active_feature_flags%22%2C%22value%22%3A%22actions-ux-201012%22%2C%22operator%22%3A%22icontains%22%2C%22type%22%3A%22event%22%7D%5D).

## Environment

Cloud latest version.


#### *Thank you* for your bug report – we love squashing them!

CC @timgl 

ee/clickhouse/models/property.py
from typing import Any, Dict, List, Optional, Tuple
from ee.clickhouse.client import sync_execute
from ee.clickhouse.models.cohort import format_filter_query
from ee.clickhouse.models.util import is_int, is_json
from ee.clickhouse.sql.events import SELECT_PROP_VALUES_SQL, SELECT_PROP_VALUES_SQL_WITH_FILTER
from ee.clickhouse.sql.person import GET_DISTINCT_IDS_BY_PROPERTY_SQL
from posthog.models.cohort import Cohort
from posthog.models.property import Property
from posthog.models.team import Team
def parse_prop_clauses(
    filters: List[Property], team_id: int, prepend: str = "", table_name: str = ""
) -> Tuple[str, Dict]:
    final = []
    params: Dict[str, Any] = {"team_id": team_id}