controllers: fix useHostNetworkForCsiControllersKey parsing from CM

csi controller plugin host network was getting set to false if the
useHostNetworkForCsiControllersKey was not present, changed it to apply
the correct value only if the key is present

Signed-off-by: Rohan Gupta <rohgupta@redhat.com>

Author: rohan47

internal/controller/operatorconfigmap_controller.go

@@ -573,8 +573,10 @@ func (c *OperatorConfigMapReconciler) reconcileDelegatedCSI(storageClients *v1al
 		if c.AvailableCrds[VolumeGroupSnapshotClassCrdName] {
 			driverSpecDefaults.SnapshotPolicy = csiopv1.VolumeGroupSnapshotPolicy
 		}
-		csiCtrlPluginHostNetwork, _ := strconv.ParseBool(c.operatorConfigMap.Data[useHostNetworkForCsiControllersKey])
-		driverSpecDefaults.ControllerPlugin.HostNetwork = ptr.To(csiCtrlPluginHostNetwork)
+		if csiCtrlPluginHostNetworkVal, exists := c.operatorConfigMap.Data[useHostNetworkForCsiControllersKey]; exists {
+			csiCtrlPluginHostNetwork, _ := strconv.ParseBool(csiCtrlPluginHostNetworkVal)
+			driverSpecDefaults.ControllerPlugin.HostNetwork = ptr.To(csiCtrlPluginHostNetwork)
+		}
 		if cniNetworkAnnotationValue != "" {
 			if driverSpecDefaults.ControllerPlugin.Annotations == nil {
 				driverSpecDefaults.ControllerPlugin.Annotations = map[string]string{}