Align with latest OTel semantic conventions #13498
Description
kgateway version
main
Kubernetes Version
N/A
Describe the bug
Today some HTTP attributes still follow older OpenTelemetry semantic conventions. For example, spans use http.status_code rather than the current http.response.status_code, and legacy HTTP attribute names such as http.method and http.url are present.
Expected Behavior
We should align with the latest semantic conventions.
Steps to reproduce the bug
Ingest traces/logs into a backend and explore attributes.
Additional Environment Detail
No response
Additional Context
No response