refactor ♻️: Refactor task to use template for creating systemd service.

This commit refactors the existing task to utilize a template for creating systemd services, enhancing modularity and maintainability.

templates/wol-interfaces.service.j2

@@ -0,0 +1,13 @@
+[Unit]
+Description=Set Wake-on-LAN on network interfaces
+After=network.target
+Wants=network.target
+
+[Service]
+Type=oneshot
+ExecStart=/bin/bash -c '{% for intf, enabled, supported in en_interfaces | zip(wol_enabled.results, wol_supported.results) %}
+{% if wol_mode in supported.stdout and wol_mode not in enabled.stdout %}/sbin/ethtool -s {{ intf }} wol {{ wol_mode }}; {% endif %}{% endfor %}'
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target