Banner image URL is exposed on the course list and course details API
endpoints. The new `banner_image_url` API field has both the relative
and absolute URLs for the image it represents, if it is set.
Adds a course_ids api that can filter by user role, since the courses
api could not perform well enough for this, and returned much more
data than we need.
Additionally, adds a LazyPageNumberPagination to provide more accurate
counts in the pagination response when using LazySequence with the
queryset.
BOM-897
- Remove escaping in display_name_with_default
- Move escaped version to deprecated display_name_with_default_escaped
- Does not include any other changes to remove double-escaping
Thanks to agaylard who initiated this work:
https://github.com/edx/edx-platform/pull/10756
TNL-3425
* Catalog results are now paginated
* Implements the new namespaced pagination described at
https://openedx.atlassian.net/wiki/pages/viewpage.action?pageId=47481813
* API level code returns pythonic business objects
* View layer performs serialize at the view layer
* Convert views to use DRF generic views
* Removes an unintentional authentication decorator that caused
the detail endpoint to return a 401 for anonymous users
MA-1724
