Automatic merge from submit-queue (batch tested with PRs 43005, 46660, 46385, 46991, 47103)

[gke-slow always fails] Defer DeleteGCEStaticIP before asserting error

From https://github.com/kubernetes/kubernetes/issues/46918.

I'm getting close to the root cause: During tests, CreateGCEStaticIP() in fact successfully created static IP, but the parser we wrote in test mistakenly think we failed, probably because the gcloud output format was changed recently (or not). I'm still looking into fixing that.

This PR defer the delete function before asserting the error so that we can stop consistently leaking static IP in every run.

/assign @krzyzacy @dchen1107 

```release-note
NONE
```