Document how to customize OTel semantics

[jinnovation]

Supplements the configuration reference entry for this field w/ a more user-facing breakdown of the choices.

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Important

Adds documentation on customizing OpenTelemetry trace semantics in export-opentelemetry-traces.mdx, detailing configuration options and impacts.

• Documentation:
  • Adds section on changing trace semantics in export-opentelemetry-traces.mdx.
  • Describes options: OpenTelemetry semantic conventions for Generative AI and OpenInference.
  • Explains configuration using export.otlp.traces.format in tensorzero.toml.
  • Clarifies impact on tag names and logic in traces.

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