feat(axiom sink): Add trace data support to Axiom Configuration for the axiom sink

[darach]

Summary

Enhance axiom sink to support trace data.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

Is this a breaking change?

• Yes
• No

How did you test this PR?

Configure Vector with an Otel source and inject traces.
Configure Vector with a HTTP sink configured for Axiom and verify traces are ingested to a dataset.
Configure Vector with Axiom sink and confirm configuration error for trace data.
Modify axiom sink to enable trace data.
Run updated Vector with Axiom sink and verify traces are ingested to the same dataset as the HTTP sink.

The following configuration is now legal and working in vector:

sources:
  opentelemetry:
    type: opentelemetry
    grpc:
      address: 0.0.0.0:4317
    http:
      address: 0.0.0.0:4318

sinks:
  axiom:
    type: axiom
    inputs:
      - opentelemetry.traces # Note only trace data subset from the source are propagated
    compression: gzip
    token: xaat-beefbeef-cafe-4444-cafe-feedfeedfeed
    dataset: vector_trace_to_axiom_dataset_via_vector_axiom_sink

Does this PR include user facing changes?

• Yes. Please add a changelog fragment based on our guidelines.
• No. A maintainer will apply the "no-changelog" label to this PR.

Notes

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References

• Closes: Enhance Axiom sink to support traces #22933

[darach]

@jszwedko Let me know if I missed anything. Checks LGTM locally.