Verbosity in Metrics, Hyperparameter Logging, Improved Synthetic Data Generation, Better Async Support

In DeepEval v0.21.62, we:

• added an option to print out intermediate steps during metric execution, which can be configured via the verbose_mode parameter: https://docs.confident-ai.com/docs/metrics-answer-relevancy#example
• hyperparameters can be logged to Confident AI via the evaluate() function: https://docs.confident-ai.com/docs/getting-started#optimizing-hyperparameters
• Synthetic data generation now gives more realistic results and is more customizable: https://docs.confident-ai.com/docs/evaluation-datasets-synthetic-data