Write documentation on how to monitor NGF using tracing

[sjberman]

As an NGF user
I want to know how to configure tracing
So that I can monitor my traffic flow easily

Acceptance

• Write a tutorial on how to set up, configure, and view tracing data for traffic flows from NGF to backend workloads
• Link to OTEL documentation on how to set up a collector, but use the otel-collector as an example in our setup