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

tools/challenge-helper-scripts/helpers/get-arg-values.js

@@ -0,0 +1,15 @@
+// Creates an object with the values starting at the third position of argv,
+// ['lorem', 'ipsum', 'one=1', 'two=2', ...] => { one: 1, two: 2, ...}
+function getArgValues(argv = []) {
+  return argv.slice(2).reduce((argsObj, arg) => {
+    const [argument, value] = arg.replace(/\s/g, '').split('=');
+
+    if (!argument || !value) {
+      throw `Invalid argument/value specified: ${arg}`;
+    }
+
+    return { ...argsObj, [argument]: value };
+  }, {});
+}
+
+exports.getArgValues = getArgValues;