✨ feat: Add GOOGLE_LOC environment variable for configurable Google API location

[berry-13]

Summary

Closes #4065

This pull request introduces a new environment variable, GOOGLE_LOC, allowing the Google API location to be configurable. This enhances flexibility in selecting the appropriate regional endpoint when interacting with Google services

Key Changes

• Added the GOOGLE_LOC environment variable to the configuration
• Updated relevant service configurations to utilize GOOGLE_LOC for Google API requests (api/app/clients/GoogleClient)

Change Type

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Testing

no testing since I don't have a key for Google and Vertex AI

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• I have made pertinent documentation changes
• My changes do not introduce new warnings
• I have written tests demonstrating that my changes are effective or that my feature works
• Local unit tests pass with my changes
• Any changes dependent on mine have been merged and published in downstream modules.
• A pull request for updating the documentation has been submitted.