EOS log aggregation with Grafana Loki.

<!--HTML-->EOS provides a very detailed log system which provides useful information of all the user and system operations that are performed at any time. Each EOS daemon has its own log file and tracing operations that involve different components can be a time consuming task (MGM -> FST1 -> FST2). With Grafana Loki and Promtail, we setup a logging aggregation system that allows tracing operations across different EOS components from a central and unified interface, considerably reducing the time needed for debugging sessions or usage patterns investigation.