ci: skip async delete for nightly pipeline (#2765)

* skip async delete in nightly pipeline since we use hard version of azure-ipam

* update spacing

* address comment

Author: camrynl

.pipelines/singletenancy/cilium-overlay/cilium-overlay-e2e-step-template.yaml

@@ -188,11 +188,15 @@ steps:
     displayName: "Run Wireserver and Metadata Connectivity Tests"
   
   - script: |
-      cd hack/scripts
-      chmod +x async-delete-test.sh
-      ./async-delete-test.sh
-      if ! [ -z $(kubectl -n kube-system get ds  azure-cns | grep non-existing) ]; then
-        kubectl -n kube-system patch daemonset azure-cns --type json -p='[{"op": "remove", "path": "/spec/template/spec/nodeSelector/non-existing"}]'
+      if [ "$CILIUM_VERSION_TAG" = "cilium-nightly-pipeline" ]; then
+        echo "Running nightly, skip async delete test"
+      else
+        cd hack/scripts
+        chmod +x async-delete-test.sh
+        ./async-delete-test.sh
+        if ! [ -z $(kubectl -n kube-system get ds azure-cns | grep non-existing) ]; then
+          kubectl -n kube-system patch daemonset azure-cns --type json -p='[{"op": "remove", "path": "/spec/template/spec/nodeSelector/non-existing"}]'
+        fi
       fi
     name: "testAsyncDelete"
     displayName: "Verify Async Delete when CNS is down"