Summary:
This PR introduces a new BigQuery function and updates the infrastructure to enable comparison of validation reports between two specified versions.

BigQuery Table Value Function

• bigquery/compare-validation-reports.sql: Added a new function, compare_validation_reports, designed to compare validation reports between a previous and a current version. This procedure generates a merged report highlighting the differences in validation notices, including new and dropped notices.

Terraform Configuration

• infra/metrics/main.tf: Updated Terraform configuration to include a new BigQuery routine resource, compare_validation_reports. This change ensures the deployment and management of the new function in the infrastructure.

Testing Instructions:
To test the function, execute the following call in the dev environment:

SELECT * FROM `mobility-feeds-dev.data_analytics.compare_validation_reports`('5.0.1', '5.0.2-SNAPSHOT');

Example of connected sheet with the results

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
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