refactor(tests): update viewport page object usage to async and update all effected tests (#5927)

tests/Length.spec.ts

@@ -13,7 +13,8 @@ test('should display the length tool', async ({
   viewportPageObject,
 }) => {
   await mainToolbarPageObject.measurementTools.length.click();
-  await viewportPageObject.active.clickAt([
+  const activeViewport = await viewportPageObject.active;
+  await activeViewport.clickAt([
     { x: 364, y: 234 },
     { x: 544, y: 232 },
   ]);