Enhance "kind delete cluster(s)" command

[yuanchen8911]

Why?

kind delete cluster(s) command doesn't report any error if the cluster(s) to be deleted doesn't exist. The output can be misleading.

What?

Check if the cluster(s) to be deleted exist or not. If it doesn't exist, report an error `cluster xxx doesn't exist"

Example

Current version:

$ kind delete clusters non-existing-cluster
Deleted clusters: ["non-existing-cluster"]

New version:

$ kind delete clusters non-existing-cluster
failed to delete cluster "non-existing-cluster": cluster "non-existing-cluster" doesn't exist
Deleted clusters: []

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[aojea]

This is on purpose, I'm from mobile right now but there should be some issue or or explaining this decision

[k8s-ci-robot]

@yuanchen8911: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kind-e2e-kubernetes-1-24	0c00ecf	link	true	/test pull-kind-e2e-kubernetes-1-24

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[yuanchen8911]

/retest

[BenTheElder]

this is a breaking change we will not be accepting, with past discussions in the issue tracker e.g. #2924

kind delete cluster(s) is like rm -f, for use re-entrantly in scripts.