Merge pull request #46448 from dashpole/disk_eviction_defaults

Automatic merge from submit-queue

Set Kubelet Disk Defaults for the 1.7 release

The `--low-diskspace-threshold-mb` flag has been depreciated since 1.6.
This PR sets the default to `0`, and sets defaults for disk eviction based on the values used for our [e2e tests](https://github.com/kubernetes/kubernetes/blob/master/test/e2e_node/services/kubelet.go#L145).
This also removes the custom defaults for vagrant, as the new defaults should work for it as well.

/assign @derekwaynecarr 
cc @vishh 

```release-note
By default, --low-diskspace-threshold-mb is not set, and --eviction-hard includes "nodefs.available<10%,nodefs.inodesFree<5%"
```

hack/local-up-cluster.sh

@@ -45,7 +45,7 @@ CGROUP_DRIVER=${CGROUP_DRIVER:-""}
 USER=${USER:-$(whoami)}
 
 # enables testing eviction scenarios locally.
-EVICTION_HARD=${EVICTION_HARD:-"memory.available<100Mi"}
+EVICTION_HARD=${EVICTION_HARD:-"memory.available<100Mi,nodefs.available<10%,nodefs.inodesFree<5%"}
 EVICTION_SOFT=${EVICTION_SOFT:-""}
 EVICTION_PRESSURE_TRANSITION_PERIOD=${EVICTION_PRESSURE_TRANSITION_PERIOD:-"1m"}