test(e2e): replace waitForVolumeLoad with viewport render waits (#6000)

tests/3DMain.spec.ts

@@ -5,6 +5,7 @@ import {
   screenShotPaths,
   test,
   visitStudy,
+  waitForViewportsRendered,
 } from './utils';
 
 test.beforeEach(async ({ page }) => {
@@ -17,7 +18,7 @@ test.describe('3D main Test', async () => {
   test('should render 3D main correctly.', async ({ page, mainToolbarPageObject }) => {
     await mainToolbarPageObject.layoutSelection.threeDMain.click();
     await attemptAction(() => reduce3DViewportSize(page), 10, 100);
-    await mainToolbarPageObject.waitForVolumeLoad();
+    await waitForViewportsRendered(page);
     await checkForScreenshot(page, page, screenShotPaths.threeDMain.threeDMainDisplayedCorrectly);
   });
 });