v2.2.x Chore - Improve tests/run_selective.py tool with better error handling and SOLID design

[coderabbitai]

Background

This issue is created as a follow-up to a discussion in PR #330 (#330).

Proposed Improvements

The following improvements should be explored for the tests/run_selective.py tool:

1. Exception handling improvements

   • Implement better exception handling closer to the testcases rather than in the main() function
   • Add targeted exception handling for specific error cases

2. Modularization

   • Refactor the main() function to improve modularity
   • Extract responsibilities into separate functions following Single Responsibility Principle

3. SOLID design improvements

   • Review the overall structure for adherence to SOLID principles
   • Improve separation of concerns
   • Consider implementing a more robust logging system for errors

Implementation Notes

• These changes should be implemented on a separate test branch
• The implementation should maintain compatibility with existing test workflows
• Any changes should follow the project's coding guidelines

Related PR

This issue originated from a comment in PR #330 (#330 (comment))

CC: @reactive-firewall