perf: re-use CreateFleet calls for validation

[ryan-mist]

Fixes #N/A

Description

• Re-use existing successful CreateFleet calls to confirm that the EC2NodeClass is valid for launching nodes
  • i.e. when a successful CreateFleet call occurs, update the validation cache for the EC2NodeClass to allow next dry-run validation to be "skipped"

How was this change tested?

• make presubmit
• /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]

✅ Deploy Preview for karpenter-docs-prod canceled.

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[ryan-mist]

/karpenter snapshot

[github-actions]

Preview deployment ready!

Preview URL: https://pr-8409.d18coufmbnnaag.amplifyapp.com

Built from commit b734f301ef1295631b997f834bc0887ef23df64f

[github-actions]

Snapshot successfully published to oci://021119463062.dkr.ecr.us-east-1.amazonaws.com/karpenter/snapshot/karpenter:0-b734f301ef1295631b997f834bc0887ef23df64f.
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/karpenter --version "0-b734f301ef1295631b997f834bc0887ef23df64f" --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

[coveralls]

Pull Request Test Coverage Report for Build 17181711532

Details

• 62 of 80 (77.5%) changed or added relevant lines in 6 files are covered.
• 10 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.01%) to 67.19%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/operator/operator.go	0	1	0.0%
pkg/controllers/nodeclass/validation.go	45	62	72.58%

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/nodeclass/validation.go	1	84.84%
pkg/fake/utils.go	2	95.09%
pkg/fake/ec2api.go	7	85.42%

Totals
Change from base Build 17162691683:	-0.01%
Covered Lines:	7571
Relevant Lines:	11268

---

💛 - Coveralls