Investigate Promtail capturing system logs and viewing them in Grafana

Older grafana documentation references these configuration options for promtail. See if we can get this support working in the latest chart version and have them display in Grafana.

https://grafana.com/docs/loki/v2.4.x/installation/helm/#run-promtail-with-syslog-support

• Promtail successfully sending system logs to Loki/Grafana