Use functions from analysis_integrals

[JoshuaLampert]

See the discussion in #151 (comment).
I'm not sure if that's what you had in mind, @ranocha, but this should work, shouldn't it? We know that the functions within cb.affect!.analysis_integrals have the same order as the entries of the NamedTuple ints = integrals(cb). So we can just get the functions from there.

TODO:

• Add a test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.78%. Comparing base (6ab2051) to head (71d8dce).
Report is 1 commits behind head on main.

Additional details and impacted files

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##             main     #152   +/-   ##
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  Coverage   97.78%   97.78%           
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  Files          18       18           
  Lines        1667     1667           
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  Hits         1630     1630           
  Misses         37       37           

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[ranocha]

Yes, that's what I had in mind. Thanks!