fix: correct error type for NodeClaim helpers

[jmdeal]

Fixes #N/A

Description
This corrects the error type returned for the NodeClaimForNode utility function. Additionally, corrects some of the comments. The only reference to this utility function already correctly handled both error types so no update is needed there.

karpenter/pkg/controllers/nodeclaim/podevents/controller.go

Lines 71 to 76 in 8101424

	// If there's no associated node claim, it's not a karpenter owned node.
	nc, err := nodeutils.NodeClaimForNode(ctx, c.kubeClient, node)
	if err != nil {
	// if the nodeclaim doesn't exist, or has duplicates, ignore.
	return reconcile.Result{}, nodeutils.IgnoreDuplicateNodeClaimError(nodeutils.IgnoreNodeClaimNotFoundError(fmt.Errorf("getting nodeclaims for node, %w", err)))
	}

How was this change tested?
make presubmit

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

[coveralls]

Pull Request Test Coverage Report for Build 11188829925

Details

• 5 of 5 (100.0%) changed or added relevant lines in 1 file are covered.
• 12 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.03%) to 80.635%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/scheduling/requirements.go	2	98.01%
pkg/controllers/provisioning/scheduling/nodeclaim.go	2	89.13%
pkg/utils/node/node.go	8	70.59%

Totals
Change from base Build 11169601877:	0.03%
Covered Lines:	8436
Relevant Lines:	10462

---

💛 - Coveralls

[jonathan-innis]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jmdeal, jonathan-innis

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