Summary:

This PR updates the feed endpoints and the search endpoint to use the extracted locations and includes a new country field for each location within the gtfs_feeds response.

Out of Scope:

• Filtering behaviour should use the english version of the locations in Location filters using the regional language #662 (this is also needed to update the integration tests)

Expected Behavior:

• Each location in the response now includes a country field.
• All location fields are provided in English.

Testing Tips:

1. Access the UI link provided in the PR comments.
2. Navigate through the feeds.
3. Inspect the network tab response to verify the presence of the country field.
4. Ensure that all location fields are in English.

Please make sure these boxes are checked before submitting your pull request - thanks!

• Run the unit tests with ./scripts/api-tests.sh to make sure you didn't break anything
• Add or update any needed documentation to the repo
• Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• Linked all relevant issues
• Include screenshot(s) showing how this pull request works and fixes the issue(s)