* docs: udpate docs to reflect new state of OpenTelemetry collector
* docs: add OTel collector and Datadog screenshots
These images are referenced by the capture_telemetry_logs guides but were
missing from the tree, which broke the link checker across all locales.
* docs: address PR review on OTel collector guide
- Clarify that OpenTelemetry Traces and Logs are separate integrations
sharing the same fields (resolves Traces/Logs wording inconsistency)
- List regional Datadog OTLP hosts (US1/US3/US5/EU1/AP1) so users outside
US5 can copy the right domain
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