Automatic merge from submit-queue (batch tested with PRs 67986, 68210, 67817). If you want to cherry-pick this change to another branch, please follow the instructions here: https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md.

Fix panic when processing http response

**What this PR does / why we need it**:

When Azure ARM API gets something wrong, kube-controller-manager may panic because of azure cloud provider:

```
/usr/local/go/src/runtime/asm_amd64.s:2361
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x1d4cad9]

goroutine 1386 [running]:
k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/runtime.HandleCrash(0x0, 0x0, 0x0)
	/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go:58 +0x107
panic(0x44468c0, 0x8b76a30)
	/usr/local/go/src/runtime/panic.go:502 +0x229
k8s.io/kubernetes/pkg/cloudprovider/providers/azure.processHTTPRetryResponse(0x0, 0x64ffec0, 0xc4229fd1f0, 0xc422ed05b0, 0x2, 0x2)
	/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/pkg/cloudprovider/providers/azure/azure_backoff.go:364 +0x69
k8s.io/kubernetes/pkg/cloudprovider/providers/azure.(*Cloud).CreateOrUpdatePIPWithRetry.func1(0xc422ed0600, 0x0, 0x0)
	/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/pkg/cloudprovider/providers/azure/azure_backoff.go:205 +0x298
```

This PR fixes that.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #68209

**Special notes for your reviewer**:

Should cherry pick to old releases.

**Release note**:

```release-note
Fix panic when processing Azure HTTP response.
```