ID-82: fix suite-level unmatched requirements bug

[karlnaden]

Summary

Previously, the requirement coverage checker contained a bug where when addressing requirements linked to a test for which the requirement set it not linked to the suite would cause an error. Now, that error is resolved by using the same logic that handles suite-level requirements elsewhere .

Testing Guidance

Found and verified when updating CRD test kit requirements. To confirm:

1. run bundle exec inferno console to access the Inferno console.
2. run Inferno::CLI::RequirementsCoverageChecker.new(:ig_requirements).run. You will see in the table written to the console, a row for short_id "suite" (the suite has a requirement at the suite level in a requirement set not linked to the suite). Previously, no table would have been returned. (NOTE: the command will still end in an error due to no output directory, which is expected in inferno-core).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.79%. Comparing base (07f8680) to head (394b655).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #779      +/-   ##
==========================================
+ Coverage   84.78%   84.79%   +0.01%     
==========================================
  Files         297      297              
  Lines       13969    13969              
  Branches     1955     1955              
==========================================
+ Hits        11843    11845       +2     
+ Misses       2118     2116       -2     
  Partials        8        8              

Flag	Coverage Δ
backend	92.48% <ø> (+0.03%)	⬆️
frontend	79.39% <ø> (ø)

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