fix(pyramid): add missing http.response.status_code in duration metrics (#4448)

* fix(pyramid): add missing http.response.status_code in duration metrics

The new convention for metrics use http.response.status_code in metrics for
http.server.request.duration metric:

https://opentelemetry.io/docs/specs/semconv/http/http-metrics/#metric-httpserverrequestduration

Only the old convention had the attribute for pyramid, but the new one was missing.

* Update .changelog/4448.fixed

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Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>