Schema translation for http.flavor -> net.app.protocol.name/version

[trask]

What are you trying to achieve?

It would be helpful if there was schema translation support for the change proposed in #2626.

cc @jsuereth

[arminru]

The existing "rename_attributes" transformation (https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/schemas/file_format_v1.1.0.md#rename_attributes-transformation) might be sufficient for that.
If we use it this way, we should clarify this in the schema spec, though.