🏗️(e2e) cleaning and more consistant naming

Clean up e2e tests by removing unused utils
and renaming some files for consistency.

src/frontend/apps/e2e/__tests__/app-impress/auth.setup.ts

@@ -1,6 +1,6 @@
 import { FullConfig, FullProject, chromium, expect } from '@playwright/test';
 
-import { keyCloakSignIn } from './common';
+import { keyCloakSignIn } from './utils-common';
 
 const saveStorageState = async (
   browserConfig: FullProject<unknown, unknown>,