revert async email sending (#11134)

## Purpose

Revert async function that causes 502

Author: ihorsokhanexoft

framework/auth/views.py

@@ -989,8 +989,7 @@ def resend_confirmation_post(auth):
             if user:
                 if throttle_period_expired(user.email_last_sent, settings.SEND_EMAIL_THROTTLE):
                     try:
-                        send_confirm_email_async(user, clean_email, renew=True)
-                        # send_confirm_email(user, clean_email, renew=True)
+                        send_confirm_email(user, clean_email, renew=True)
                     except KeyError:
                         # already confirmed, redirect to dashboard
                         status_message = f'This email {clean_email} has already been confirmed.'