fix: applyKcatConstraints prevent NaN in light ecModels

[edkerk]

Main improvements in this PR:

• Fixes:
  • applyKcatConstraints occassionally fills S-matrix with NaN in light ecModels (solves #344)

Instructions on merging this PR:

• [x] This PR has develop as target branch, and will be resolved with a squash-merge.
• [ ] This PR has main as target branch, and will be resolved with a merge commit.

[github-actions[bot]]

This PR has been automatically tested with GH Actions. Here is the output of the tests:

 
Running geckoCoreFunctionTests
Done geckoCoreFunctionTests
__________

Note: In the case of multiple test runs, this post will be edited.