Experiments with behavioral cohorts can be created

[neilkakkar]

Bug description

We disabled behavioral cohorts for feature flags, but looks like users can subvert this by using an experiment instead. Not great.

Please describe.
If this affects the front-end, screenshots would be of great help.

How to reproduce

1. Create an experiment
2. Add behavioral cohort filter. Save.
3. See feature flag with behavioral cohort created

Environment

• [ ] PostHog Cloud
• [ ] self-hosted PostHog, version/commit: please provide

Additional context

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