[Backport 7.57.x] [APM] Normalize X-Datadog-Container-Tags header #28699
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Backport 296ae23 from #28662.
HTTP header values cannot contain line breaks. This PR ensures that if Container Tags contain line breaks, the value is sanitized to replace those line breaks with underscores. It would otherwise result in an invalid header/request.
What does this PR do?
This is a fix for https://datadoghq.atlassian.net/browse/APMS-13035
HTTP header values cannot contain line breaks. This PR ensures that if Container Tags contain line breaks, the value is sanitized to replace those line breaks with underscores. It would otherwise result in an invalid header/request.
Motivation
https://datadoghq.atlassian.net/browse/APMS-13035
Additional Notes
Possible Drawbacks / Trade-offs
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