content/en/tracing/trace_collection/open_standards: corrections

[gbbr]

Some corrections as agreed upon:

• [x] "Alongside the Datadog Agent" moved out of "Using Kubernetes" section
• [x] Removed confusing parenthesis mentioning collector.yaml
• [x] Switched "Kubernetes Infrastructure Metrics" wording to "Kubernetes attributes"

[github-actions[bot]]

Preview links (active after the build_preview check completes)

Modified Files

• https://docs-staging.datadoghq.com/gbbr/otel-corrections/tracing/trace_collection/open_standards/otel_collector_datadog_exporter