Freeze break request: fix up rsyncd role

[Kevin Fenzi]

Right now our rsyncd role isn't enabling the systemd service on rhel9
hosts. So, I fixed that and also cleaned up the logic since we don't
have any Fedora instances anymore than have xinetd. Only rhel7 and rhel8
have xinetd anymore.

https://pagure.io/fedora-infra/ansible/pull-request/1366

Please check my logic in case I made any mistakes. :) 

+1s from any sysadmin-main/releng folks welcome.

kevin