llms/openai: fix for openallm function calls - must have a Name

[kraney]

PR Checklist

• [ ] Read the Contributing documentation.
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• [ ] Name your Pull Request title clearly, concisely, and prefixed with the name of the primarily affected package you changed according to Good commit messages (such as memory: add interfaces for X, Y or util: add whizzbang helpers).
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[FluffyKebab]

@kraney Can you fix the lint and add a test that checks for this?

[tmc]

@kraney can you rebase this?