[rebased #3360] cluster: drop DisableLocalStorageCapacityIsolation

[BenTheElder]

Rebased https://github.com/kubernetes-sigs/kind/pull/3360, original description below:

it was used to workaround a kubelet crash issue with rootless providers.

The Kubelet seems to work fine now with localStorageCapacityIsolation enabled in a user namespace so drop the special handling. After this change, ephemeral storage can be used in a rootless cluster.

Closes: https://github.com/kubernetes-sigs/kind/issues/3359

[k8s-ci-robot]

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[aojea]

all fedora jobs failed?

[BenTheElder]

There was a flake SSH-ing to the VM in each of them, doesn't seem related.

[BenTheElder]

it never even ran kind in this flake https://github.com/kubernetes-sigs/kind/actions/runs/9457245522/job/26088691929#step:7:22

failed during rootless setup

[BenTheElder]

I'd like all the CI to pass here ideally before merge.

I don't think the issue is with these changes though so we should probably debug elsewhere.

https://github.com/kubernetes-sigs/kind/pull/648 will run these without changes

[BenTheElder]

Rebased again after #3653

[BenTheElder]

All tests passing now.

[aojea]

/lgtm