April-Assistant-API-SDK-updates and fixes

[gloveboxes]

• Updated to the latest OpenAI SDK and Pinned so will continue to work until the samples are next updated
• Fixed Imports
• Rather than manually pooling use the client.beta.threads.runs.poll(run_id=run.id, thread_id=thread.id) API

Description

Checklist

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• [ ] I have coordinated with the docs team (mldocs@microsoft.com) if this PR deletes files or changes any file names or file extensions.
• [ ] This notebook or file is added to the CODEOWNERS file, pointing to the author or the author's team.