Few changes to correct the radiation region extention

[DarioV86]

Linked Issues

Closes #{ID}

Description

Interface Changes

Checklist

I confirm that I have completed the following checks:

• [ ] Tests run locally and pass pytest tests --reactor
• [ ] Code quality checks run locally and pass pre-commit run --from-ref develop --to-ref HEAD
• [ ] Documentation built locally and checked sphinx-build -W documentation/source documentation/build

[sonarcloud[bot]]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.

Project coverage is 74.56%. Comparing base (b1cf23b) to head (a2a2505).

Files	Patch %	Lines
bluemira/radiation_transport/radiation_profile.py	0.00%	5 Missing :warning:
...luemira/radiation_transport/flux_surfaces_maker.py	0.00%	3 Missing :warning:
bluemira/radiation_transport/radiation_tools.py	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #3417 +/- ## =========================================== - Coverage 74.57% 74.56% -0.01% =========================================== Files 231 231 Lines 26810 26812 +2 =========================================== Hits 19993 19993 - Misses 6817 6819 +2 ```

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