License Compliance - Add `order_by` filter

Main issue: #33870 (comment 317653175) Sub issue convention: gitlab-com/www-gitlab-com#4588 (closed)

Updates the /projects/-/licenses.json endpoint to support an order_by= filter to allow custom sorting. This task is to add support for sorting the software licenses by classification. The ranking of the classifications can be found in: #33870 (comment 317653175)