Automatic merge from submit-queue (batch tested with PRs 52751, 52898, 52633, 52611, 52609). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>..

Add default value for RouteReconciliationPeriod in cloud controller manager

**What this PR does / why we need it**:
Add default sync period value config for RouteReconciliationPeriod. For now the default value is 0, which means zero cooldown time.

The value is taken from kube-controller-manager:
https://github.com/kubernetes/kubernetes/blob/b2b079b95a867b560fd327cba56e7d3878f43dc3/cmd/kube-controller-manager/app/options/options.go#L73

**Which issue this PR fixes**

**Special notes for your reviewer**:

**Release note**: