POTEL 28 - Use auto.opentelemetry for POTel span origin

[adinauer]

#skip-changelog

📜 Description

Use auto.opentelemetry for POTel span origin

💡 Motivation and Context

So we can better distinguish it from our legacy OpenTelemetry integration.

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against 0e10d90