Issue with evaluating openai-based LLMs with mlflow.evaluate() API (#1843)

* covered the case wherein the scan doesn't find any issues

* added new mlflow model-type and removed legacy workarounds

* added new mlflow model-type and removed legacy workarounds

* updated the mlflow notebook

* Update giskard_evaluator_utils.py error message

* fixed fallback of _generate_test_suite

* fixed fallback of _generate_test_suite

* debugging

* Revert "debugging"

This reverts commit 6c939d7.

* small typo fixed

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Co-authored-by: Rabah Abdul Khalek <rabahabdulkhalek@Rabahs-MacBook-Pro-2.local>
Co-authored-by: Hartorn <bazire@giskard.ai>

Author: 3 people