adds webhooks for giftcards (Z#23205473) (#5834)

* adds giftcard webhook events

* maps issuer_id of giftcard to organizer_id for logging

* adds new giftcard logtypes for transactions that aren't manual

* log_action calls cleanup

* drop acceptance webhook

* add acceptor_id to the giftcard transaction webhook event

* add missing log_action statements

* add new webhooks to docs

* fix tests

* fix linting

src/pretix/control/views/orders.py

@@ -1226,7 +1226,11 @@ class OrderRefundView(OrderView):
                     customer=order.customer,
                     testmode=order.testmode
                 )
-                giftcard.log_action('pretix.giftcards.created', user=self.request.user, data={})
+                giftcard.log_action(
+                    action='pretix.giftcards.created',
+                    user=self.request.user,
+                    data={}
+                )
                 refunds.append(OrderRefund(
                     order=order,
                     payment=None,