Merge Configurarion and Example configuration section

Prepare one example copnfiguration with proper comments and defaults included into it. This should follow approach we have in [opentelemetry collector](https://github.com/SumoLogic/sumologic-otel-collector/tree/abb158bbc87d95b6be86489cd406d43e0004941d/pkg/exporter/sumologicexporter#sumo-logic-exporter)