fix upgrade runtimesdk test

Author: arshadd-b

test/e2e/cluster_upgrade_runtimesdk.go

@@ -304,6 +304,10 @@ func ClusterUpgradeWithRuntimeSDKSpec(ctx context.Context, inputGetter func() Cl
 checkControlPlaneVersion(ctx, input.BootstrapClusterProxy.GetClient(), clusterResources.Cluster, controlPlaneVersion)
 checkWorkersVersions(ctx, input.BootstrapClusterProxy.GetClient(), clusterResources.Cluster, workersVersion)
 
+// wait for all Machines to exist before starting the upgrade.
+waitControlPlaneVersion(ctx, input.BootstrapClusterProxy.GetClient(), clusterResources.Cluster, controlPlaneVersion, input.E2EConfig.GetIntervals(specName, "wait-control-plane-upgrade"))
+waitWorkersVersions(ctx, input.BootstrapClusterProxy.GetClient(), clusterResources.Cluster, workersVersion, input.E2EConfig.GetIntervals(specName, "wait-machine-upgrade"))
+
 // Add a BeforeClusterUpgrade hook annotation to block via the annotation.
 beforeClusterUpgradeAnnotation := clusterv1.BeforeClusterUpgradeHookAnnotationPrefix + "/upgrade-test"
 patchHelper, err := patch.NewHelper(clusterResources.Cluster, input.BootstrapClusterProxy.GetClient())