Remove data streams support for the Create or update alias API

[gaobinlong]

Description

This is a follow-up PR of https://github.com/opensearch-project/documentation-website/pull/7641/files, we need to remove the data streams support in the documentation of Create or update alias API, because currently we don't support adding data streams to alias.

Issues Resolved

No issue.

Version

Since 2.15.0

Frontend features

If you're submitting documentation for an OpenSearch Dashboards feature, add a video that shows how a user will interact with the UI step by step. A voiceover is optional.

Checklist

• [ ] By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and subject to the Developers Certificate of Origin. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

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