refactor(terraform): Use Terraform Functions to Reduce Repetitive Code

[carlagesa]

We can make our code more dynamic and less repetitive by leveraging built-in Terraform functions. We should review the current configuration for opportunities to use functions for tasks like string formatting, data manipulation, or creating conditional logic, thereby making the code more concise and maintainable.

Acceptance Criteria:

• Review the existing code for any hardcoded strings or values that could be generated dynamically.
• Implement at least one Terraform function (e.g., format, lookup, merge) to replace a hardcoded or repetitive block of code.
• Ensure the infrastructure plan remains unchanged after implementing the function.