feat: refactor and test tools steps utilities (#42693)

tools/challenge-helper-scripts/delete-step.js

@@ -1,12 +1,9 @@
 const fs = require('fs');
-
-const {
-  reorderSteps,
-  padWithLeadingZeros,
-  getExistingStepNums,
-  getProjectPath,
-  getArgValues
-} = require('./utils');
+const { getArgValues } = require('./helpers/get-arg-values');
+const { getExistingStepNums } = require('./helpers/get-existing-step-nums');
+const { getProjectPath } = require('./helpers/get-project-path');
+const { padWithLeadingZeros } = require('./helpers/pad-with-leading-zeros');
+const { reorderSteps } = require('./utils');
 
 const stepExists = (steps, stepToFind) => steps.includes(stepToFind);