fix: ensure node leases aren't leaked

[jmdeal]

Fixes #N/A

Description

This PR makes two changes to the NodeClaim lifecycle controller to ensure node leases aren't leaked:

• The NodeClaim must be registered before being initialized. This ensures NodeClaims aren't candidates for voluntary disruption mechanisms if the Node hasn't had the termination finalizer added by the registration sub-reconciler.
• When terminating a NodeClaim, only delete the associated Nodes if the NodeClaim is registered. Similar to the first change, this ensures we don't delete Nodes which don't have Karpenter's termination finalizer. These Nodes should be removed out-of-band by CCM once the underlying instance has terminated.

How was this change tested?
make test

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

[njtran]

/lgtm
/approve

[njtran]

/hold

[coveralls]

Pull Request Test Coverage Report for Build 11802960194

Details

• 13 of 18 (72.22%) changed or added relevant lines in 2 files are covered.
• 6 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.005%) to 80.832%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controllers/nodeclaim/lifecycle/controller.go	10	15	66.67%

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/nodeclaim/lifecycle/controller.go	1	71.07%
pkg/utils/nodeclaim/nodeclaim.go	2	37.07%
pkg/controllers/nodeclaim/lifecycle/initialization.go	3	86.11%

Totals
Change from base Build 11787793721:	-0.005%
Covered Lines:	8476
Relevant Lines:	10486

---

💛 - Coveralls

[jonathan-innis]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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• OWNERS [jonathan-innis,njtran]

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[jonathan-innis]

/remove-hold