fix(BA-514): the required state output logic in the openopi reference doc

[Yaminyam]

resolves #3447 (BA-514)
The handling of multiple states and one state was different.
And since the state is a set, we need to use sorted to guarantee the order so that we can always generate the same document.

Checklist: (if applicable)

• Milestone metadata specifying the target backport version
• Mention to the original issue
• Documentation
  • Contents in the docs directory
  • docstrings in public interfaces and type annotations

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📚 Documentation preview 📚: https://sorna--3460.org.readthedocs.build/en/3460/

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📚 Documentation preview 📚: https://sorna-ko--3460.org.readthedocs.build/ko/3460/

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• docs/manager/rest-reference/openapi.json: Language not supported

[fregataa]

Good, but the openapi schema has been updated again

[Yaminyam]

Good, but the openapi schema has been updated again

Yes I updated it to a schema generated with correct logic!