deprecate data in authClients/supabase.ts

[thedavidprice]

...continuing from #2896 (comment)

Re:

  }): Promise<{
    user: User | null
    session: Session | null
    error: Error | null
    data: Session | User | null // Deprecated
  }>

Next Steps:

• fix: Removes deprecated data for session supabase/auth-js#179
• upgrade to future supabase release that includes fix