Review current filters for removal or deprecation

[mariajgrimaldi]

Description

There are a few events that are not being used in any service that should be reviewed to decide whether to drop support:

• CourseEnrollmentQuerysetRequested

And others where we should review for deprecation like the filters placed in views replaced by MFEs.

Definition of Done

• The team that implemented the filters is aware of the filter's status
• The filters were implemented in a service, removed or deprecated.