FIX: Rejected emails should not be cleaned up before their logs (#17648)

* FIX: Rejected emails should not be cleaned up before their logs

If we delete the rejected emails before we delete their associated logs
we will receive 404 errors trying to inspect an email message for that
log.

* don't add a blank line

* test for max value as well

* pr cleanup and add migration

* Fix failing test

config/site_settings.yml

@@ -1266,7 +1266,7 @@ email:
   raw_rejected_email_max_length: 4000
   delete_rejected_email_after_days:
     default: 90
-    max: 36500
+    validator: "DeleteRejectedEmailAfterDaysValidator"
   enable_secondary_emails:
     client: true
     default: true