JSON-formatted stdout is now the only supported log shape in CrewAI
Enterprise — the `CREWAI_LOG_FORMAT=json` opt-in env var is gone and
no longer needs to be configured in AMP. Removes the "Enabling JSON
output" section, the env-var setup step, the troubleshooting check,
and the `legacy text mode` comparison across the four locale copies
(`en`, `ko`, `pt-BR`, `ar`) of `docs/edge/<lang>/enterprise/guides/datadog.mdx`.