feat(vertex_ai): Support task type and title in embeddings models #149
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The embeddings API now support a "task type" parameter to define the kind of task the embedding will be used for to help the model produce better quality embeddings.
For RETRIEVAL_DOCUMENT task, a "title" parameter can also be attached.
These two new parameters are only supported in models released in or after August 2023.
Docs:
https://cloud.google.com/vertex-ai/docs/generative-ai/embeddings/get-text-embeddings#api_changes_to_models_released_in_or_after_august_2023