ci:[CNI] Add Retry to connectivity test (#2015)

ci: Add Retry to connectivity test

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

@@ -150,6 +150,7 @@ steps:
       echo "Run Cilium Connectivity Tests"
       cilium status
       cilium connectivity test
+    retryCountOnTaskFailure: 3
     name: "ciliumConnectivityTests"
     displayName: "Run Cilium Connectivity Tests"