fix(e2e): remove 'local' keyword outside function context

The 'local' bash keyword can only be used inside a function. Using it
at top-level of a run: block causes 'local: can only be used in a
function' error and exits the script with code 1.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.github/workflows/e2e.yaml

@@ -68,7 +68,7 @@ jobs:
           done
           echo ""
           echo "=== In-cluster service account check ==="
-          local in_cluster=false
+          in_cluster=false
           if [ -f /var/run/secrets/kubernetes.io/serviceaccount/token ]; then
             echo "Service account token present — in-cluster mode available"
             echo "KUBERNETES_SERVICE_HOST=${KUBERNETES_SERVICE_HOST:-}"