don't check network inventory path if upi

pkg/asset/machines/vsphere/capimachines.go

@@ -82,6 +82,11 @@ func GenerateMachines(ctx context.Context, clusterID string, config *types.Insta
 	result := make([]*asset.RuntimeFile, 0, len(machines))
 	staticIP := false
 
+	isUPI := false
+	if len(config.VSphere.APIVIPs) == 0 || len(config.VSphere.IngressVIPs) == 0 {
+		isUPI = true
+	}
+
 	for mIndex, machine := range machines {
 		providerSpec, ok := machine.Spec.ProviderSpec.Value.Object.(*machinev1.VSphereMachineProviderSpec)
 		if !ok {
@@ -99,9 +104,12 @@ func GenerateMachines(ctx context.Context, clusterID string, config *types.Insta
 
 		capvNetworkDevices := []capv.NetworkDeviceSpec{}
 		for _, networkDevice := range providerSpec.Network.Devices {
-			networkName, err := getNetworkInventoryPath(vcenterContext, networkDevice.NetworkName, providerSpec)
-			if err != nil {
-				return nil, fmt.Errorf("unable to get network inventory path: %w", err)
+			networkName := ""
+			if !isUPI {
+				networkName, err = getNetworkInventoryPath(vcenterContext, networkDevice.NetworkName, providerSpec)
+				if err != nil {
+					return nil, fmt.Errorf("unable to get network inventory path: %w", err)
+				}
 			}
 			deviceSpec := capv.NetworkDeviceSpec{
 				NetworkName: networkName,