Add console command to remove assignments with non-exists roles/permissions

[vjik]

[samdark]

Why would we have these? Shouldn't we remove such assignments when role/permission is removed?

[vjik]

Why would we have these? Shouldn't we remove such assignments when role/permission is removed?

It's actual for case when roles keep in PHP storage and assignments in DB storage.
Example: remove roles in PHP code and deploy it; after deploy non-actual assignments will remain in DB.

[samdark]

Should we change this behavior? Before removing a role delete all assignments?