datadog-agentあるならopentelemetry collectorなくてもtrace送りつけられるやんけ
https://www.datadoghq.com/ja/blog/ingest-opentelemetry-traces-metrics-with-datadog-agent/
https://www.datadoghq.com/ja/blog/ingest-opentelemetry-traces-metrics-with-datadog-agent/