chore: fix unfinishedWorkSeconds metric

[jigisha620]

Fixes #N/A

Description Fix unfinishedWorkSeconds metric that is being leaked because a a unique metric is getting created each time with the id and controller.

How was this change tested?

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

[k8s-ci-robot]

Hi @jigisha620. Thanks for your PR.

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[coveralls]

Pull Request Test Coverage Report for Build 11864231888

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.02%) to 81.012%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/disruption/consolidation.go	4	88.55%
<!--	Total:	4		-->

Totals
Change from base Build 11861232184:	-0.02%
Covered Lines:	8597
Relevant Lines:	10612

---

💛 - Coveralls

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jigisha620, jonathan-innis

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kubernetes-sigs/karpenter/blob/main/OWNERS)~~ [jonathan-innis] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment