ci: don't remove cluster with unhealthy mng

[jmdeal]

Fixes #N/A

Description
Skips the cluster cleanup process if the kubelet is not ready on one of the MNG nodes. This is to help diagnose the following failure: https://github.com/aws/karpenter-provider-aws/actions/runs/8032556917/job/21942085645.

How was this change tested?
/karpenter snapshot

Does this change impact docs?

• Yes, PR includes docs updates
• Yes, issue opened: #
• No

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[netlify]

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[jmdeal]

/karpenter snapshot

[coveralls]

Pull Request Test Coverage Report for Build 8118291183

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 82.642%

---

Totals
Change from base Build 8118173378:	0.02%
Covered Lines:	5256
Relevant Lines:	6360

---

💛 - Coveralls

[github-actions]

Snapshot successfully published to oci://021119463062.dkr.ecr.us-east-1.amazonaws.com/karpenter/snapshot/karpenter:0-fb352b4610e8ec1f7d558a8e7b98048a4c818c4a.
To install you must login to the ECR repo with an AWS account:

aws ecr get-login-password --region us-east-1 | docker login --username AWS --password-stdin 021119463062.dkr.ecr.us-east-1.amazonaws.com

helm upgrade --install karpenter oci://021119463062.dkr.ecr.us-east-1.amazonaws.com/karpenter/snapshot --version "0-fb352b4610e8ec1f7d558a8e7b98048a4c818c4a" --namespace "kube-system" --create-namespace \
  --set "settings.clusterName=${CLUSTER_NAME}" \
  --set "settings.interruptionQueue=${CLUSTER_NAME}" \
  --set controller.resources.requests.cpu=1 \
  --set controller.resources.requests.memory=1Gi \
  --set controller.resources.limits.cpu=1 \
  --set controller.resources.limits.memory=1Gi \
  --wait

[jonathan-innis]

LGTM 🚀