Add icing losses to bespoke

[ppinchuk]

Now that we officially support CT curve inputs, we can finally merge the icing losses for Bespoke branch. Thanks for authoring this @WilliamsTravis!

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 97.05882% with 1 line in your changes missing coverage. Please review.

Project coverage is 87.65%. Comparing base (1971309) to head (f2a9180).

Files with missing lines	Patch %	Lines
reV/bespoke/bespoke.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #519      +/-   ##
==========================================
+ Coverage   87.61%   87.65%   +0.04%     
==========================================
  Files         121      121              
  Lines       18382    18401      +19     
==========================================
+ Hits        16105    16130      +25     
+ Misses       2277     2271       -6     

Flag	Coverage Δ
unittests	87.65% <97.05%> (+0.04%)	⬆️

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