Test obfuscation

[AndyRae]

Pull Request Contents

♻️ Refactor
🛠️ Repo maintenance

Description

Adds tests for the obfuscation methods in the core logic. Small code movement / deletion also.

Would note that test_apply_filters_combined_leak
This is not how Bunny is implemented - we always run LNS before rounding.
However, the CLI can order how they want.

• Remove unused methods (apply_filters, get_result_modifiers)
• Moves get_results_modifiers_from_str to results_modifiers file
• Removes union types in favour of |

Related Issues or other material

• Closes Unit test obfuscation.py #43

✅ Added/updated tests?

• This PR contains relevant tests
  • Or doesn't need to per the below explanation

• I've completed all actions and tasks detailed in the PR Template