JP-2572: Updating the handler for the suppression of one good group ramps.

[kmacdonald-stsci]

Due to the possibility the first groups of a ramp could be flagged as DO_NOT_USE, as well as the way the jump detector works, the one good group suppression handler needed to be modified to handle these cases as well.

[codecov]

Codecov Report

Merging #92 (a1456a1) into main (aa8c814) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #92      +/-   ##
==========================================
+ Coverage   90.13%   90.15%   +0.02%     
==========================================
  Files          16       16              
  Lines        2433     2438       +5     
==========================================
+ Hits         2193     2198       +5     
  Misses        240      240              

Impacted Files	Coverage Δ
src/stcal/ramp_fitting/ramp_fit.py	96.84% <100.00%> (+0.17%)	⬆️

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[mwregan2]

Looks good to me.

[dmggh]

Aside from 2 minor comments, looks good.