Add input boxes for required user inputs

[claudevdm]

Add input boxes to user required inputs in example notebooks.

Colab diffs: automatic_model_refresh

automatic_model_refresh.ipynb bigquery_enrichment_transform.ipynb bigtable_enrichment_transform.ipynb vertex_ai_text_embeddings.ipynb dataframe_api_preprocessing.ipynb gemma_2_sentiment_and_summarization.ipynb nlp_tensorflow_streaming.ipynb run_inference_pytorch.ipynb run_inference_sklearn.ipynb run_inference_tensorflow.ipynb run_inference_tensorflow_with_tfx.ipynb run_inference_vertex_ai.ipynb run_inference_vllm.ipynb vertex_ai_feature_store_enrichment.ipynb beam_nlp.ipynb

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[claudevdm]

R: @damccorm

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