With preemptible nodes, a cluster node (with a given hostname) can
boot the first time with IP1, then be preempted and boot again with
different IP2.
With IP="", Calico will autodetect IP1 on first boot, but will not
perform autodetection on subsequent boots and so will not release IP1
and detect IP2 instead.
With IP=autodetect, Calico will perform autodetection on all boots,
which is what we want.
Without this it fails after deployments were switched from
extensions to apps with
```
E0902 11:25:51.197420 1 reflector.go:283] github.com/kubernetes-incubator/cluster-proportional-autoscaler/pkg/autoscaler/k8sclient/k8sclient.go:96: Failed to watch *v1.Node: unknown (get nodes)
E0902 11:25:53.118490 1 reflector.go:283] github.com/kubernetes-incubator/cluster-proportional-autoscaler/pkg/autoscaler/k8sclient/k8sclient.go:96: Failed to watch *v1.Node: unknown (get nodes)
E0902 11:25:54.997493 1 reflector.go:283] github.com/kubernetes-incubator/cluster-proportional-autoscaler/pkg/autoscaler/k8sclient/k8sclient.go:96: Failed to watch *v1.Node: unknown (get nodes)
E0902 11:25:57.097423 1 reflector.go:283] github.com/kubernetes-incubator/cluster-proportional-autoscaler/pkg/autoscaler/k8sclient/k8sclient.go:96: Failed to watch *v1.Node: unknown (get nodes)
E0902 11:25:59.097417 1 reflector.go:283] github.com/kubernetes-incubator/cluster-proportional-autoscaler/pkg/autoscaler/k8sclient/k8sclient.go:96: Failed to watch *v1.Node: unknown (get nodes)
I0902 11:25:59.697325 1 k8sclient.go:221] Falling back to extensions/v1beta1, error using apps/v1: deployments.apps "calico-typha" is forbidden: User "system:serviceaccount:kube-system:typha-cpha" cannot get resource "deployments/scale" in API group "apps" in the namespace "kube-system"
E0902 11:25:59.699833 1 autoscaler_server.go:120] Update failure: the server could not find the requested resource
```
Ref. https://github.com/kubernetes/test-infra/pull/13709
Automatic merge from submit-queue (batch tested with PRs 59767, 56454, 59237, 59730, 55479). 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>.
Change critical pods’ template to use priority
**What this PR does / why we need it**:
Change critical pods’ template to use priority
Thanks.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
ref #57471
**Special notes for your reviewer**:
**Release note**:
```release-note
```
