Update workflow to use e2e runners

Author: tobikli

.github/workflows/playwright.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   test:
     timeout-minutes: 60
-    runs-on: ubuntu-latest
+    runs-on: [self-hosted, e2e-test]
     env:
       KEYCLOAK_USER: ${{ secrets.KEYCLOAK_USER }}
       KEYCLOAK_PWD: ${{ secrets.KEYCLOAK_PWD }}