refactor,chore(egen) : added delete experiment code in cleanup section and required packages in installation section

[Jayakrishna2801]

This PR includes

changed variable REGION to LOCATION
added matplotlib and pandas in installation section
added delete experiment code in cleanup section
performed linter test
followed template guidelines
REQUIRED: Fill out the below checklists or remove if irrelevant

1. If you are opening a PR for Official Notebooks under the notebooks/official folder, follow this mandatory checklist:

• Use the notebook template as a starting point.
• Follow the style and grammar rules outlined in the above notebook template.
• Verify the notebook runs successfully in Colab since the automated tests cannot guarantee this even when it passes.
• Passes all the required automated checks. You can locally test for formatting and linting with these instructions.
• You have consulted with a tech writer to see if tech writer review is necessary. If so, the notebook has been reviewed by a tech writer, and they have approved it.
• This notebook has been added to the CODEOWNERS file under the Official Notebooks section, pointing to the author or the author's team.
• The Jupyter notebook cleans up any artifacts it has created (datasets, ML models, endpoints, etc) so as not to eat up unnecessary resources.

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[gericdong]

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[kittyabs]

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[katiemn]

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[katiemn]

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[katiemn]

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