Move end of tour route into tour.py

In https://github.com/alphagov/notifications-admin/pull/3663/files we
made specific routes for sending the ‘tour’ text message, rather than
sharing the ‘one-off’ routes in `send.py`.

This commit moves the final route in the tour journey into `tour.py` as
well, which is where I expected to find it when I was looking for it
just now.

app/main/views/send.py

@@ -815,17 +815,6 @@ def start_job(service_id, upload_id):
     )
 
 
-@main.route("/services/<uuid:service_id>/end-tour/<uuid:example_template_id>")
-@user_has_permissions('manage_templates')
-def go_to_dashboard_after_tour(service_id, example_template_id):
-
-    service_api_client.delete_service_template(service_id, example_template_id)
-
-    return redirect(
-        url_for('main.service_dashboard', service_id=service_id)
-    )
-
-
 def fields_to_fill_in(template, prefill_current_user=False):
 
     if 'letter' == template.template_type:

app/main/views/tour.py

@@ -1,6 +1,6 @@
 from flask import abort, redirect, render_template, session
 
-from app import current_service, current_user, url_for
+from app import current_service, current_user, service_api_client, url_for
 from app.main import main
 from app.main.views.send import (
     all_placeholders_in_session,
@@ -149,3 +149,14 @@ def check_tour_notification(service_id, template_id):
         back_link=back_link,
         help='2',
     )
+
+
+@main.route("/services/<uuid:service_id>/end-tour/<uuid:example_template_id>")
+@user_has_permissions('manage_templates')
+def go_to_dashboard_after_tour(service_id, example_template_id):
+
+    service_api_client.delete_service_template(service_id, example_template_id)
+
+    return redirect(
+        url_for('main.service_dashboard', service_id=service_id)
+    )