Document open telemetry ingestion using forward protocol

**Is your feature request related to a problem? Please describe.**
There is no clear documentation to send open telemetry via fluentbit in HA mode via fluentd or another fluentbit to a hub aggregator like vector

**Describe the solution you'd like**
A documented and supported solution to do this that everyone can use

**Describe alternatives you've considered**
We dont want to use a load balancer to provide ingestion with HA

The POC repo is here
https://github.com/yogzblr/fb-forward-poc

The readme mentioned what was tested. Can this get into official documentation