Code review comment for ~rgildein/charm-telegraf:bug1988312

Functional tests are failing for `bionic-compute` and `focal-compute`
bundle due issue with sudoers.

```bash
# from unit
ubuntu@juju-5ead5f-zaza-12d45d4743f5-8:~$ sudo su
>>> /etc/sudoers.d/telegraf_ovs: syntax error near line 10 <<<
sudo: parse error in /etc/sudoers.d/telegraf_ovs near line 10
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy plugin
```

Not sure if this is related, but it worked fine for `jammy-compute`.