* Moving plugins infrastructure to edx-django-utils This PR extracts the code that enables plugins in edx-platform and puts it in edx-django-utils. This is done to allow other IDAS to add plugin functionality.
Zendesk API proxy endpoint
Introduced via EDUCATOR-1889
Purpose
This djangoapp contains no models, just a single view. The intended purpose is to provide a way for unauthenticated POST requests to create ZenDesk tickets. The reason we use this proxy instead of a direct POST is that it allows us to keep ZenDesk credentials private, and rotate them if needed. This proxy endpoint should be rate-limited to avoid abuse.