feat: add validation service available via network shares or via network socket

tasks/configure_iptables_externalusers.yml

tasks/install_validation_tools.yml

tasks/main.yml

...r/local/lib/systemd/system/validation_daemon_@.service.j2

.../local/lib/systemd/system/validation_daemon_any.socket.j2

...ocal/lib/systemd/system/validation_daemon_any@.service.j2