refactor: (GenAI) Reorganized Grounding Samples (Group B)

[Thoughtseize1]

Description

Created new folder

Region_tag	New file
generativeaionvertexai_gemini_grounding_with_web	grounding/web_example.py
generativeaionvertexai_gemini_grounding_with_vais	grounding/vais_example.py
generativeaionvertexai_grounding	grounding/palm_example.py

❗Files need to be deleted after approval in /generative_ai folder:

• grounding.py
• grounding_test.py
• gemini_grounding_example.py
• Marked tests in test_gemini_examples.py

I was unable to successfully test the following Samples. PTAL at doc

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 add 3 region tags.

• generative_ai/grounding/palm_example.py:28, tag generativeaionvertexai_grounding
• generative_ai/grounding/vais_example.py:24, tag generativeaionvertexai_gemini_grounding_with_vais
• generative_ai/grounding/web_example.py:22, tag generativeaionvertexai_gemini_grounding_with_web

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment

[Thoughtseize1]

I encountered several issues while testing these samples. In general:
google.api_core.exceptions.InternalServerError: 500 Internal error encountered.

Please refer to the document where I have outlined the problems and possible improvements in the documentation.

[msampathkumar]

Update: google.api_core.exceptions.InternalServerError: 500 Internal error encountered. - As the CICD tests run in parallel, this error seem occur. Manually re-starting the CICD.

Hi Holt, this request is open for 2 weeks. So I am reviewing and closing if off.