feat: assume 'state: present' for new iptables rules, unless something different is explicitely set

vars/clamav.yml

 ---
-clamav_cfg_path: "{{ '/etc/' if ansible_distribution == 'RedHat' else '/etc/clamav/' | default('/etc/') }}"
+clamav_cfg_path: "{{ '/etc/clamd.d/' if ansible_distribution == 'RedHat' else '/etc/clamav/' | default('/etc/') }}"