Automatic merge from submit-queue. 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>.

Use PATCHs instead of PUTs in CIDR allocator

Ref https://github.com/kubernetes/kubernetes/issues/52292

/cc @wojtek-t 

cc @kubernetes/sig-network-misc @bowei @MrHohn 

```release-note
NONE
```