This is the most important feature that came up in Jaeger v2 discussions, but it does not actually require v2, can be done standalone.

• Add OTLP receiver to collector Add OTLP receiver to collector #3701
• Update documentation Give more emphasis to OpenTelemetry documentation#578
• Add OTLP receiver to agent - let's wait for user demand
• Support configuration of the receiver (ports) Introduce OTLP receiver configuration flags #3710