langchain[patch]: Cerebrium model_api_request deprecation (#12704)
- **Description:** As part of my conversation with Cerebrium team,
`model_api_request` will be no longer available in cerebrium lib so it
needs to be replaced.
- **Issue:** #12705 12705,
- **Dependencies:** Cerebrium team (agreed)
- **Tag maintainer:** @eyurtsev
- **Twitter handle:** No official Twitter account sorry :D
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Co-authored-by: Bagatur <baskaryan@gmail.com>