* feat: Adds a new discussion topic configuration mechanism
The new discussion configuration system links discussion topics directly to the course structure. This change adds a new task that sends a discussion update signal if there are any changes to the course. This signal includes all the context needed to update the configuration of the course.
The handler for this new event will create a new entry for each unit that needs a topic in the database. In the future this will be used to see the topics in the course.
* fix: add support for marking a provider as supporting LTI
* fix: review feedback
* feat: Adds discussions settings for new discusions experience
This commit adds new discussions settings for the new discussions experience. These are stored in the course so they can be a part of course import/export flow.
These are also added to the discussions configuraiton API to allow MFEs to update the settings.
The discussions API is currently available via LMS, however that means it cannot save changes to the modulestore. This also adds the API to the studio config so it can now also be accessed from studio and be used to save course settings.
* fix: tests
This PR lays the groundwork for a an LTI tab that can embed any LTI1.1-based
tool as an course tab. It also adds another tab based on this LTI Tab that
offers special support for embedding LTI-based discussion tools in a course
tab. If enabled this will replace the existing discussion tab.
