Support OpenTelemetry 1.39

[alexmojaki]

I see bbdf0ea contains:

  "opentelemetry-api>=1.36.0, <1.39.0",  # OpenTelemetry - keep below 1.39.0 due to current agent_engines exporter constraints.

I couldn't find any other discussion about this.

[sanketpatil06]

@alexmojaki, Thank you for bringing this to our attention. The request is under review, and I’ll keep you updated if any additional information is required.