Export raw Chianti collision and A_ul data instead of pre-processing

[andrewfullard]

📝 Description

Type: ☣️ breaking change

The Chianti data was previously processed in Carsus to work with TARDIS. With the latest changes to TARDIS in tardis-sn/tardis#2770 this will not be necessary, and TARDIS will handle the processing.

For the Einstein A_ul coefficients, Chianti has some levels with gf = 0. This means that A_ul is computed to be zero even if the levels are included. Changes in this PR allow the Chianti A_ul values to be retained. This probably breaks for CMFGEN data.

SHOULD ONLY BE MERGED IN CONJUNCTION WITH tardis-sn/tardis#2896

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[codecov]

Codecov Report

Attention: Patch coverage is 28.57143% with 10 lines in your changes missing coverage. Please review.

Project coverage is 67.38%. Comparing base (3403655) to head (b79d73b).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
carsus/io/output/levels_lines.py	0.00%	6 Missing ⚠️
carsus/io/output/collisions.py	0.00%	3 Missing ⚠️
carsus/io/output/base.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #414      +/-   ##
==========================================
+ Coverage   66.68%   67.38%   +0.70%     
==========================================
  Files          46       46              
  Lines        3497     3462      -35     
==========================================
+ Hits         2332     2333       +1     
+ Misses       1165     1129      -36     

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[jvshields]

We should think about if we want to leave the old carsus interpolation as a deprecated format so people can still generate the same atomic data they were doing before. Potentially important for reproducing old results, though if it's too painful maybe we just tell people to use old carsus instead.