Drupal Commerce purchase event gets sent multiple times if someone refreshes the checkout success page

Marking duplicate of 🐛 Commerce begin_checkout event can fire multiple times with ajax panes Needs review so we can combine efforts there.

I uploaded the patch we are using at https://www.drupal.org/project/google_tag/issues/3437889#comment-15549086 📌 Send the purchase event when an order is placed, not paid Needs review