[TEST][Docs] Test updating examples generation script

[leemthompo]

Assumes the JSON report includes all necessary file information, meaning the hardcoded files_to_generate list can be ignored.

[github-actions[bot]]

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[leemthompo]

@pquentin this hack assumes the alternatives_report.json is the single source of truth

[pquentin]

We now use https://github.com/elastic/request-converter to generate examples, closing. Thank you!