Anonymise customer first and last names

These were added a couple of years ago in #8763
But I guess we never noticed the names weren't getting anonymised.

The old 'name' field is still in the DB. It was kept for compatibility during migraiton but never cleaned up. I've added the tech debt task to the welcome new devs board now: #8835

lib/tasks/data/anonymize_data.rake

@@ -46,10 +46,14 @@ namespace :ofn do
                               unconfirmed_email = concat(id, '[email protected]')")
       Customer.where(user_id: nil)
         .update_all("email = concat(id, '[email protected]'),
-                     name = concat('Customer Number ', id, ' (without connected User)')")
+                     name = concat('Customer Number ', id, ' (without connected User)'),
+                     first_name = concat('Customer Number ', id),
+                     last_name = '(without connected User)'")
       Customer.where.not(user_id: nil)
         .update_all("email = concat(user_id, '[email protected]'),
-                     name = concat('Customer Number ', id, ' - User ', user_id)")
+                     name = concat('Customer Number ', id, ' - User ', user_id),
+                     first_name = concat('Customer Number ', id),
+                     last_name = concat('User ', user_id)")
 
       Spree::Order.update_all("email = concat(id, '[email protected]')")
     end