refactor(generative-ai): Cleaning samples - Group A (Controlled Generation, Embeddings, Extensions, Function Calling)

[Thoughtseize1]

Description

Cleaning Samples after refactoring Group A

Related PR's:

Feature Name	PR Link
Controlled Generation	PR#12573
Embeddings	PR#12575
Extensions	PR#12587
Function Calling	PR#12591

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.9 (see Test Environment Setup)
• Lint pass: nox -s lint (see Test Environment Setup)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

[snippet-bot]

Here is the summary of changes.

You are about to delete 24 region tags.

• generative_ai/chat_completions/chat_completions_function_calling_basic.py:18, tag generativeaionvertexai_gemini_chat_completions_function_calling_basic
• generative_ai/chat_completions/chat_completions_function_calling_config.py:18, tag generativeaionvertexai_gemini_chat_completions_function_calling_config
• generative_ai/controlled_generation/response_mime_type.py:18, tag generativeaionvertexai_gemini_controlled_generation_response_mime_type
• generative_ai/controlled_generation/response_schema.py:18, tag generativeaionvertexai_gemini_controlled_generation_response_schema
• generative_ai/controlled_generation/response_schema.py:57, tag generativeaionvertexai_gemini_controlled_generation_response_schema_2
• generative_ai/controlled_generation/response_schema.py:104, tag generativeaionvertexai_gemini_controlled_generation_response_schema_3
• generative_ai/controlled_generation/response_schema.py:169, tag generativeaionvertexai_gemini_controlled_generation_response_schema_4
• generative_ai/controlled_generation/response_schema.py:238, tag generativeaionvertexai_gemini_controlled_generation_response_schema_6
• generative_ai/controlled_generation/response_schema.py:287, tag generativeaionvertexai_gemini_controlled_generation_response_schema_7
• generative_ai/embedding.py:16, tag generativeaionvertexai_sdk_embedding
• generative_ai/embedding_batch.py:30, tag generativeaionvertexai_sdk_embedding_batch
• generative_ai/embedding_model_tuning.py:15, tag generativeaionvertexai_sdk_embedding
• generative_ai/embedding_preview.py:17, tag generativeaionvertexai_sdk_embedding
• generative_ai/function_calling.py:24, tag generativeaionvertexai_gemini_function_calling
• generative_ai/function_calling.py:114, tag generativeaionvertexai_gemini_function_calling_advanced
• generative_ai/function_calling_chat.py:23, tag generativeaionvertexai_gemini_function_calling_chat
• generative_ai/gemini_extensions.py:25, tag generativeaionvertexai_create_extension
• generative_ai/gemini_extensions.py:53, tag generativeaionvertexai_execute_extension
• generative_ai/gemini_extensions.py:74, tag generativeaionvertexai_get_extension
• generative_ai/gemini_extensions.py:90, tag generativeaionvertexai_list_extensions
• generative_ai/gemini_extensions.py:104, tag generativeaionvertexai_delete_extension
• generative_ai/multimodal_embedding_image.py:28, tag generativeaionvertexai_sdk_multimodal_embedding_image
• generative_ai/multimodal_embedding_image_video_text.py:28, tag generativeaionvertexai_sdk_multimodal_embedding_image_video_text
• generative_ai/multimodal_embedding_video.py:27, tag generativeaionvertexai_sdk_multimodal_embedding_video

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[msampathkumar]

CICD Error:

File "/workspace/generative_ai/function_calling/chat_function_calling_config.py", line 80, in generate_text
    print("Function:", response.choices[0].message.tool_calls[0].id)
TypeError: 'NoneType' object is not subscriptable

[msampathkumar]

Approved the PR after, manually verified several region tags.