Fix insight to return data when it is chargeable

[SecondeJK]

Number Insight API Handling currently throws exceptions when it shouldn't.

Description

Due to the design of NIv1, 43, 44 and 45 status codes are chargeable and therefore the client should return the partial data that has been returned.

Motivation and Context

Arose from #463

How Has This Been Tested?

Complete tests were not available for NI. I have added suitable API call mocks.

Example Output or Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (2b0306e) 79.12% compared to head (76a6559) 79.18%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #466 +/- ## ============================================ + Coverage 79.12% 79.18% +0.05% Complexity 2371 2371 ============================================ Files 218 218 Lines 6353 6356 +3 ============================================ + Hits 5027 5033 +6 + Misses 1326 1323 -3 ```

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