Adding AOAI Grader Code Sample

[Spiderpc]

Description

Checklist

• [-] I have read the contribution guidelines
• [-] 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.

[Spiderpc]

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