[Sorbet] - Add Typings for updater/lib/dependabot/updater/error_handler.rb

[kbukum1]

What are you trying to accomplish?

This change adds Sorbet typings to the ErrorHandler class within the Dependabot::Updater module. The goal is to ensure that type safety is maintained, especially when dealing with error handling and extracting the fingerprint from errors.

Anything you want to highlight for special attention from reviewers?

How will you know you've accomplished your goal?

• The code has been refactored to be type-safe with Sorbet, eliminating reliance on unsafe casts.
• The functionality for error handling and fingerprint extraction should remain unchanged, ensuring the correct error details are logged and captured.

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[randhircs]

TMLG