[pkg/otlp/model] Sync model module

[mx-psi]

What does this PR do?

Sync pkg/otlp/model with OpenTelemetry Collector Datadog exporter code. In particular this adds changes from:

• [exporter/datadog] Compatibility with ECS Fargate semantic conventions open-telemetry/opentelemetry-collector-contrib#6670 and
• [processor/resourcedetection] Update os.type attribute values open-telemetry/opentelemetry-collector-contrib#7544

Motivation

Keep codebases synced

Describe how to QA your changes

Check that OTLP metrics with the aws.ecs.launch_type aws.ecs.launchtype attribute set to fargate don't have the hostname set.

Reviewer's Checklist

• If known, an appropriate milestone has been selected; otherwise the Triage milestone is set.
• The appropriate team/.. label has been applied, if known.
• Use the major_change label if your change either has a major impact on the code base, is impacting multiple teams or is changing important well-established internals of the Agent. This label will be use during QA to make sure each team pay extra attention to the changed behavior. For any customer facing change use a releasenote.
• A release note has been added or the changelog/no-changelog label has been applied.
• Changed code has automated tests for its functionality.
• Adequate QA/testing plan information is provided if the qa/skip-qa label is not applied.
• If applicable, docs team has been notified or an issue has been opened on the documentation repo.
• If applicable, the need-change/operator and need-change/helm labels have been applied.
• If applicable, the config template has been updated.