chore: Add trace info to stdout logs to feed into GC

[spalladino]

Trace info (trace_id and span_id) is only added to logs by the OTEL exporter. This means that logs exported to stdout, currently captured by Google Cloud, do not have this info. It'd be handy to have it in google cloud as well. We need to research what does google cloud expect for tracing, and add those fields to the default sdout exporter.