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:
b2b079b95a/cmd/kube-controller-manager/app/options/options.go (L73)
**Which issue this PR fixes**
**Special notes for your reviewer**:
**Release note**: