feat(anta.tests): Nested test results

[gmuloc]

Description

Add a new option to allow to expand "atomic results" for a test in report:
Implements CLI, Option in reporter and result_manager
Need more thorough testing

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have run pre-commit for code linting and typing (pre-commit run)
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (tox -e testenv)

[gmuloc]

Closing this for now as it complexifies how to write test and stacking tests should be investigated instead to keep things simple + caching may simplify this