tests: gha: Add timeout to cluster creation

This has been intermittently taking a while lately so let's add a
timeout.

Signed-off-by: Aurélien Bombo <abombo@microsoft.com>

.github/workflows/run-k8s-tests-on-aks.yaml

@@ -56,6 +56,7 @@ jobs:
           AZ_TENANT_ID: ${{ secrets.AZ_TENANT_ID }}
 
       - name: Create AKS cluster
+        timeout-minutes: 10
         run: bash tests/integration/kubernetes/gha-run.sh create-cluster
 
       - name: Install `bats`