[9.4](backport #51788) docs(filebeat): update troubleshooting docs to link to Filestream options

[mergify]

Changes option names and links in Filebeat troubleshooting docs to point to Filestream instead of the deprecated Log input.

Checklist

• [ ] My code follows the style guidelines of this project
• [ ] I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• [ ] I have made corresponding change to the default configuration files
• [ ] I have added tests that prove my fix is effective or that my feature works. Where relevant, I have used the stresstest.sh script to run them under stress conditions and race detector to verify their stability.
• [ ] I have added an entry in ./changelog/fragments using the changelog tool.

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This is an automatic backport of pull request #51788 done by [Mergify](https://mergify.com).

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[infra-vault-gh-plugin-prod]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[github-actions]

🔍 Preview links for changed docs

• docs/reference/filebeat/faq-deleted-files-are-not-freed.md
• docs/reference/filebeat/filebeat-cpu.md
• docs/reference/filebeat/filebeat-not-collecting-lines.md
• docs/reference/filebeat/open-file-handlers.md
• docs/reference/filebeat/reduce-registry-size.md
• docs/reference/filebeat/windows-file-rotation.md

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[github-actions]

Elastic Docs Style Checker (Vale)

Summary: 5 suggestions found

💡 Suggestions (5): Optional style improvements. Apply when helpful.

File	Line	Rule	Message
docs/reference/filebeat/filebeat-cpu.md	11	Elastic.WordChoice	Consider using 'can, might' instead of 'may', unless the term is in the UI.
docs/reference/filebeat/filebeat-not-collecting-lines.md	14	Elastic.WordChoice	Consider using 'deactivated, deselected, hidden, turned off, unavailable' instead of 'disabled', unless the term is in the UI.
docs/reference/filebeat/open-file-handlers.md	11	Elastic.Wordiness	Consider using 'many' instead of 'a large number of'.
docs/reference/filebeat/open-file-handlers.md	21	Elastic.Wordiness	Consider using 'many' instead of 'a large number of'.
docs/reference/filebeat/reduce-registry-size.md	11	Elastic.Wordiness	Consider using 'many' instead of 'a large number of'.

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The Vale linter checks documentation changes against the Elastic Docs style guide. To use Vale locally or report issues, refer to Elastic style guide for Vale.