update obi metrics with new attributes

[theSuess]

• I have read and followed the
  contribution guidelines,
  including the First-time contributing? note.
• This PR includes AI generated content, and I have read and conform to
  the
  Generative AI Contribution Policy.

This PR documents new metric attributes for the OBI network.flow.bytes metric introduced in open-telemetry/opentelemetry-ebpf-instrumentation#1088, open-telemetry/opentelemetry-ebpf-instrumentation#1027 and open-telemetry/opentelemetry-ebpf-instrumentation#887

[grcevski]

LGTM!

[tiffany76]

Thanks, @theSuess! As @maryliag mentioned, please remove the es file from this PR. The localization team will update the page later. There's a process to follow so we can keep track of drift.

[MrAlias]

The english looks good to me 👍

[theSuess]

Spanish translation is gone so this should be good to merge :)

[otelbot]

Thank you for your contribution @theSuess! 🎉 We would like to hear from you about your experience contributing to OpenTelemetry by taking a few minutes to fill out this survey.