Story #7822

Updated by ttereshc 12 months ago

### Motivation
There are cases when a user might want to remove a plugin:
- plugin is no longer in use but it's data in the db is quite large (pulp-2to3-migration case)
- incompatible plugins

### Deliverables

- all plugin related data should be removed from the DB, its schema as well
- artifacts can be left for orphan cleanup, don't need to be removed immediately
- it should be possible to install this plugin back again, make sure django migrations are applied in this case accordingly

### Original request from Katello

After a pulp2 to 3 migration, the left over migration data is quite large and needs to be cleaned up. there needs to be a command or api to clean it up.

In addition we need a way/instructions to remove the plugin altogether and delete its added schema entirely