[Authentication] Receiving email send rate limit on sign up in spite of using Auth Email Hook

# Bug report - [X] I confirm this is a bug with Supabase, not with my own application. - [X] I confirm I have searched the [Docs](https://docs.supabase.com), GitHub [Discussions](https://github.com/supabase/supabase/discussions), and [Discord](https://discord.supabase.com). **Issue**: Currently my application is hit with HTTP _429 Too Many Requests_, even though I am using Auth Email Hook. I am in the debugging phase of my setup, therefore I need to test the sign up flow, resulting in around 2-3 requests / minute during some times and always using the same mail address. Among the only Rate limit I am allowed to change is _Rate limit for sign-ups and sign-ins_ set to 60/5min. After being able to test for some time, i am receiving this response for almost 30 minutes now. `{"code":"over_email_send_rate_limit","message":"email rate limit exceeded"}` It is not entirely clear which one is the offending limit, because i was able to continue for some time but now blocked for more than 30 minutes ## Expected behavior Rate limit should not apply when using Auth Email Hook. ## Actual behavior Application is hit with a rate limit that is very limiting. My sign up attempts are blocked for more than 30 mintues ## Steps to reproduce On Supabase Project Dashboard UI - Navigate to Edge Functions and set up an edge function for handling auth email hook - Navigate to Authentication and add an Email Hook, pointing to the aforementioned edge function - While still under Authentication, verify the Rate limits -> set high value for any limit that is not disabled from editing. - Attempt sign-in flow more than 3-5 times / minute with the same email address.