zabbix-server: add missing irccat files

roles/zabbix-server/templates/irccat.json.j2

+{
+  "tcp": {
+    "listen": "localhost:12345"
+  },
+  "irc": {
+    "server": "chat.freenode.net:6697",
+    "tls": true,
+    "tls_skip_verify": false,
+    "nick": "archzabbix",
+    "realname": "Arch Zabbix Notifier",
+    "server_pass": "",
+    "identify_pass": "{{ vault_zabbix_irc_password }}",
+    "sasl_login": "archzabbix",
+    "sasl_pass": "{{ vault_zabbix_irc_password }}",
+    "channels": ["#archlinux-devops"]
+  },
+  "commands": {
+  }
+}
+

roles/zabbix-server/templates/zabbix-irc-msg.j2

+#!/bin/sh
+
+sender=$1
+subject=$2
+body=$3
+
+echo $subject | nc -c localhost 12345