simplify subnet.go code (#6009)

* simplify enqueueUpdate

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

* refactor format

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

* refactor calculate IPs

* add helper function

* simplify ip parse

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

* refactor subnet status calculation to unify IP handling

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

* split subnet status update to subnet_status.go

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

* fix status triger subnet update

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

---------

Signed-off-by: Mengxin Liu <liumengxinfly@gmail.com>

Author: oilbeater

pkg/controller/init.go

@@ -709,11 +709,7 @@ func (c *Controller) syncSubnetCR() error {
 			klog.Warningf("subnet %s is not ready", subnet.Name)
 			continue
 		}
-		if util.CheckProtocol(subnet.Spec.CIDRBlock) == kubeovnv1.ProtocolDual {
-			subnet, err = c.calcDualSubnetStatusIP(subnet)
-		} else {
-			subnet, err = c.calcSubnetStatusIP(subnet)
-		}
+		subnet, err = c.calcSubnetStatusIP(subnet)
 		if err != nil {
 			klog.Errorf("failed to calculate subnet %s used ip: %v", cachedSubnet.Name, err)
 			return err