Issue #3275323: AU Extensions: Create form workflow for updating projects

automatic_updates_extensions/automatic_updates_extensions.routing.yml

@@ -18,6 +18,8 @@ automatic_updates_extensions.module_update:
     _permission: 'administer software updates'
   options:
     _admin_route: TRUE
+    _maintenance_access: TRUE
+    _automatic_updates_readiness_messages: skip
 
 automatic_updates_extension.theme_update:
   path: '/admin/appearance/automatic-update-extensions'
@@ -28,6 +30,8 @@ automatic_updates_extension.theme_update:
     _permission: 'administer software updates'
   options:
     _admin_route: TRUE
+    _maintenance_access: TRUE
+    _automatic_updates_readiness_messages: skip
 
 automatic_updates_extension.confirmation_page:
   path: '/admin/automatic-update-extensions-ready/{stage_id}'
@@ -37,4 +41,6 @@ automatic_updates_extension.confirmation_page:
   requirements:
     _permission: 'administer software updates'
   options:
+    _admin_route: TRUE
     _maintenance_access: TRUE
+    _automatic_updates_readiness_messages: skip