Fix TSDS tutorial examples

[lcawl]

Summary

This PR fixes three code snippets in https://www.elastic.co/docs/manage-data/data-store/data-streams/set-up-tsds that fail because they use metrics-prod instead of metrics-weather-sensors.
They currently return the following errors:

{
  "error": {
    "root_cause": [
      {
        "type": "index_not_found_exception",
        "reason": "no such index [metrics-prod]",
        "resource.type": "index_or_alias",
        "resource.id": "metrics-prod",
        "index_uuid": "_na_",
        "index": "metrics-prod"
      }
    ],
    "type": "index_not_found_exception",
    "reason": "no such index [metrics-prod]",
    "resource.type": "index_or_alias",
    "resource.id": "metrics-prod",
    "index_uuid": "_na_",
    "index": "metrics-prod"
  },
  "status": 404
}

Generative AI disclosure

1. Did you use a generative AI (GenAI) tool to assist in creating this contribution?

• Yes
• No

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🔍 Preview links for changed docs

• manage-data/data-store/data-streams/set-up-tsds.md

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[kosabogi]

LGTM!