Refactor blkt poloidal height

[chris-ashe]

This pull request introduces a more detailed and flexible calculation of blanket module geometry in the process/blanket_library.py file. The main improvement is the replacement of a generic poloidal height calculation with specialized methods that account for different machine shapes (D-shaped vs. elliptical) and divertor configurations. This allows for more accurate modeling of the blanket module segment lengths in both inboard and outboard regions.

Geometry calculation enhancements:

• Added four new static methods to blanket_library.py for calculating segment lengths: calculate_dshaped_inboard_blkt_segment_poloidal, calculate_dshaped_outboard_blkt_segment_poloidal, calculate_elliptical_inboard_blkt_segment_poloidal, and calculate_elliptical_outboard_blkt_segment_poloidal. These methods use plasma geometry and divertor configuration parameters for more precise calculations.
• Updated the set_blanket_module_geometry method to select the appropriate calculation method based on machine and blanket shape, replacing the previous generic blanket_module_poloidal_height call. Segment lengths are now computed using the new specialized methods for both inboard and outboard modules.## Description

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 21.62162% with 29 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.44%. Comparing base (ca03a41) to head (d5a2243).

Files with missing lines	Patch %	Lines
process/blanket_library.py	21.62%	29 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4083      +/-   ##
==========================================
- Coverage   46.47%   46.44%   -0.04%     
==========================================
  Files         123      123              
  Lines       28902    28938      +36     
==========================================
+ Hits        13432    13440       +8     
- Misses      15470    15498      +28     

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[timothy-nunn]

Isn't this function now completely duplicate and should be removed?