[role:debops.apt] Get rid of the `if not FreeBSD` lines for facts gathering

On FreeBSD, I set `apt__enabled` to False, and therefore most tasks in `debops.apt` are not run, which is correct. However, the tasks related to gathering facts should be run: it is a fact that apt is not configured on the machine, so the `/etc/ansible/facts.d` data should reflect that.

Currently, if I let those two tasks run with setting `apt__enabled` to false, `debops bootstrap` fails.

To work around that, I have disabled the two tasks on FreeBSD. This is not correct though, as explained above. The right way to handle this would be to fix those two tasks, so that they can run with `apt__enabled: false`.

Therefore, the task is:
- [ ] Check whether upstream debops fails on a Debian host with `apt__enabled: False`.
- [ ] If yes: fix that in upstream; if not: find out what's broken and fix it in my repo.