Collect together any new report sources and/or system reports for Moodle 4.2

See previous epic for 4.1 (MDL-73987) - we have a lot of custom reports and entities that should make conversion of some existing reports to system reports very straight forward, here's a non-exhaustive list of entities:

1. Badges
2. Badges (Issued badges)
3. Blogs
4. Cohorts
5. Cohort members
6. Comments
7. Courses
8. Course categories
9. Course completion
10. Course enrolment
11. Course last access
12. Files
13. Groups
14. Group members
15. Groupings
16. Notes
17. Tags
18. Tag collections
19. Tag instances
20. Tasks
21. Users

Those entities can also be re-used in existing custom reports to give more indepth reports to users

It's important that we continue converting existing system reports, and create more report sources for custom reporting to make better use of the tool. We (Workplace team) will flesh out this epic, and issues within it, to better define requirements