Create go-live support tickets using the new way

The new way of creating support tickets can be seen in
[notifications-utils](https://github.com/alphagov/notifications-utils/pull/899).

This changes tickets created when making a request to go live to use
the new way, while other tickets stay the same for now.

The go live tags have been removed. Some of these had become
unneccessary since you can't make the request to go live unless they are
true (e.g. `notify_go_live_email_reply_to`). Others will always get
added by a Zendesk macro when the ticket is replied to, so we don't need
to add them here.

app/main/views/service_settings.py

@@ -14,6 +14,9 @@ from flask import (
 )
 from flask_login import current_user
 from notifications_python_client.errors import HTTPError
+from notifications_utils.clients.zendesk.zendesk_client import (
+    NotifySupportTicket,
+)
 from notifications_utils.timezones import utc_string_to_aware_gmt_datetime
 
 from app import (
@@ -207,10 +210,7 @@ def request_to_go_live(service_id):
 @user_has_permissions('manage_service')
 @user_is_gov_user
 def submit_request_to_go_live(service_id):
-
-    zendesk_client.create_ticket(
-        subject='Request to go live - {}'.format(current_service.name),
-        message=(
+    ticket_message = (
             'Service: {service_name}\n'
             '{service_dashboard}\n'
             '\n---'
@@ -243,13 +243,20 @@ def submit_request_to_go_live(service_id):
             existing_live='Yes' if current_user.live_services else 'No',
             email_address=current_user.email_address,
             email_reply_to=current_service.default_email_reply_to_address or 'not set',
-        ),
-        ticket_type=zendesk_client.TYPE_QUESTION,
-        user_email=current_user.email_address,
+        )
+
+    ticket = NotifySupportTicket(
+        subject=f'Request to go live - {current_service.name}',
+        message=ticket_message,
+        ticket_type=NotifySupportTicket.TYPE_QUESTION,
         user_name=current_user.name,
-        tags=current_service.request_to_go_live_tags,
+        user_email=current_user.email_address,
         requester_sees_message_content=False,
+        org_id=current_service.organisation_id,
+        org_type=current_service.organisation_type,
+        service_id=current_service.id,
     )
+    zendesk_client.send_ticket_to_zendesk(ticket)
 
     current_service.update(go_live_user=current_user.id)