Integrate playwright into gitlab ci pipeline

.gitlab-ci.yml

@@ -294,7 +294,7 @@ test-e2e:
     - *initialize-studip-database
     - npm install playwright
     - npm ci
-    - npx playwright install --with-deps --grep-invert a11y
+    - npx playwright install --with-deps
   script:
     - php -S $PHP_WEBSERVER_URL -t public &
     - PHP_SERVER_PID=$!