Fix typos in testkomodo

[larsevj]

Mismatched the variable names in teskomodo.sh earlier leading to exit codes not working properly at all. This pr fixes it and also adds shellcheck for ci/testkomodo.sh.

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure unit tests pass locally after every commit (git rebase -i main --exec 'pytest tests/ert/unit_tests -n logical -m "not integration_test"')

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Create Backport PR to latest release

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.39%. Comparing base (9f8d73a) to head (8ae6597).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8844      +/-   ##
==========================================
+ Coverage   91.37%   91.39%   +0.02%     
==========================================
  Files         342      343       +1     
  Lines       21028    21069      +41     
==========================================
+ Hits        19215    19257      +42     
+ Misses       1813     1812       -1     

Flag	Coverage Δ
cli-tests	39.64% <ø> (+0.04%)	⬆️
gui-tests	73.55% <ø> (-0.03%)	⬇️
performance-tests	50.19% <ø> (+0.13%)	⬆️
unit-tests	79.86% <ø> (+0.05%)	⬆️

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