chore(workflow): run e2e on non standard runners (#7698)

Co-authored-by: Elio Bischof <elio@zitadel.com>
(cherry picked from commit f862e43ede)

.github/workflows/e2e.yml

@@ -9,7 +9,8 @@ jobs:
       fail-fast: false
       matrix:
         browser: [firefox, chrome]
-    runs-on: ubuntu-latest
+    runs-on:
+      group: zitadel-public
     steps:
       - 
         name: Checkout Repository