feat: support OpenTelemetry's LoggingInstrumentor

[daniel-sanche]

OpenTelemetry libraries inject trace and span info into Python LogRecords. If we support these fields in this library, it would make our trace-log correlation feature work for frameworks outside of Flask/Django

#505 (comment)

[Megabytemb]

Hey. Any movement on this feature?

It would be awesome to have correlated logs working right out of the box if you instrument with OpenTelemetry.
https://cloud.google.com/logging/docs/view/correlate-logs#view-correlated-log-entries

This also then has the added benefit of linking it into Cloud Trace as well.
Really seems like a good way to tie Google services together.

[aradkdj]

Unless I'm missing something this seems to be covered by #889