Transformer dependency pinning and chat completions fix. (#3034) approved .

[kfhfar]

This a fix for the Chat Completion and Transformers issue. I am moving it to the DLC Branch for testing.

Description

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• If this change is a backward incompatible change, why must this change be made?
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Type of change

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• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

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Feature/Issue validation/testing

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