Changes

Please describe.

• change the step query result shape. Remove the last group by so that the average can be performed over entire list of results
• remove "people" check in funnel related queries as this will become deprecated in favor of a separate api call to retrieve funnel people
  If this affects the frontend, include screenshots.

Checklist

• All querysets/queries filter by Organization, by Team, and by User
• Django backend tests
• Jest frontend tests
• Cypress end-to-end tests
• Migrations are safe to run at scale (e.g. PostHog Cloud) – present proof if not obvious
• Frontend/CSS is usable at 320px (iPhone SE) and decent at 360px (most phones)
• Breaking changes are backwards-compatible. Ensure old/new frontend requests work with new/old backends, and vice versa.