documentation: update documentation for enabling tracing on a grafana instance (#56068)
documentation: update documentation for enabling tracing on a grafana instance (#56068)

This PR improves docs around enabling traces on grafana.
In order to enable tracing and get a traceID, you must set the address field in your config.ini

https://github.com/grafana/grafana/blob/main/contribute/engineering/backend/instrumentation.md#2-enable-tracing-in-grafana

grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana