Bug 2079546: [release-4.10] call clearInitialNodeNetworkUnavailableCo…

…ndition for noHostSubnet nodes

a correctly configured noHostSubnet node will never become avalible on
GCP because the unavailable condition will never be cleared.

slight changes required to make this work on 4.10

go-controller/pkg/ovn/ovn.go

@@ -1141,7 +1141,9 @@ func (oc *Controller) WatchNodes() {
 				err := oc.lsManager.AddNoHostSubnetNode(node.Name)
 				if err != nil {
 					klog.Errorf("Error creating logical switch cache for node %s: %v", node.Name, err)
+					return
 				}
+				oc.clearInitialNodeNetworkUnavailableCondition(node)
 				return
 			}