test(link-list): update utils (#7692)

### Related Ticket(s)

none 
### Description

Add a utils folder within cypress and update link-list tests



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<!-- *** "package: services": Services -->
<!-- *** "package: utilities": Utilities -->
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packages/react/tests/e2e-storybook/cypress/integration/LinkList/LinkList.e2e.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the Apache-2.0 license found in the
  * LICENSE file in the root directory of this source tree.
  */
-import getCssPropertyForRule from '../../../../utils/get-css-property-for-rule';
+import getCssPropertyForRule from '../../utils/get-css-property-for-rule';
 
 /**
  * Sets the correct path

packages/web-components/tests/e2e-storybook/cypress/integration/link-list/link-list.e2e.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the Apache-2.0 license found in the
  * LICENSE file in the root directory of this source tree.
  */
-import getCssPropertyForRule from '../../../../utils/get-css-property-for-rule';
+import getCssPropertyForRule from '../../utils/get-css-property-for-rule';
 
 /**
  * Sets the correct path

packages/web-components/tests/e2e-storybook/cypress/utils/get-css-property-for-rule.js

@@ -0,0 +1,24 @@
+/**
+ * Copyright IBM Corp. 2021
+ *
+ * This source code is licensed under the Apache-2.0 license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+export default function getCssPropertyForRule(rule, prop, sheets) {
+  const slen = sheets.length;
+  for (let i = 0; i < slen; i++) {
+    let rules;
+    try {
+      rules = sheets[i].cssRules;
+    } catch (e) {
+      continue;
+    }
+    const rlen = rules.length;
+    for (let j = 0; j < rlen; j++) {
+      if (rules[j].selectorText === rule) {
+        return rules[j].style[prop];
+      }
+    }
+  }
+}