Skip systemd and file tasks in check mode to avoid failures

[meons]

Closes #322

[meons]

Could someone review?

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[gertvdijk]

O hai, thanks for raising attention to this as well. Also running into the same and already started to type similar changes.

Disappointing to see bots adding labels like wontfix and issues+PRs being completely ignored like this. 😕

[SuperQ]

This role has been deprecated in favor of a the prometheus-community/ansible collection.