refactor: use CourseEnrollmentQuerysetRequested from openedx-filters

[JuanDavidBuitrago]

Description

This PR make a refactor to use FFI-3 with openedx-filters
Refactor from #156

Testing instructions

1. Create two Tenant sites and add at less one course on each one. Go on to create sites: http://{lms.base}:8000/admin/eox_tenant/tenantconfig/
2. In a course, in Studio, set Mobile Course Available true. Go on to configure the key: http://{studio.base}:8001/settings/advanced/{your_course_id}
3. Enroll a user (user don't have to be a staff user) in a course on different sites.
4. Add the following configurations to your configuration site.

"OPEN_EDX_FILTERS_CONFIG": {
    "org.openedx.learning.course_enrollment_queryset.requested.v1": {
        "fail_silently": false,
        "pipeline": [
            "eox_tenant.filters.pipeline.FilterUserCourseEnrollmentsByTenant"
        ]
    }
},

5. Make a request in:

• my_microsite.{lms.base}:8000/api/enrollment/v1/enrollment
• my_microsite.{lms.base}:8000/api/mobile/v1/users/{username}/course_enrollments/

6. You should see the courses where you are enrolled. Check when you don't use OPEN_EDX_FILTERS_CONFIG in your site, the request show all courses.

More information

You can try the steps in #156 with edx-platform branch

[Alec4r]

Hi @JuanDavidBuitrago , I wanna know if this PR is still important, or maybe we could close it.

[santiagosuarezedunext]

I undertand that this PR need review so I am going to create a card for it to check it in the next sprint

[JuanDavidBuitrago]

Hi @Alec4r Its important, but first we need upstream PR is merge: openedx/edx-platform#31331

[Asespinel]

@JuanDavidBuitrago I checked the PR openedx/edx-platform#31331 and it's not yet closed. Can we review this PR? Or do we need to wait for the openedx-filter to pass all the tests first?

[JuanDavidBuitrago]

I'm going to continue working on it, it has to be merged in this sprint