chore: remove instance terminating status condition if instance did not get deleted

[jigisha620]

Fixes #N/A

Description
With karpenter aws-provider we saw an issue where eventual consistency with EC2 can cause the underlying instance to be still around even when cloudProvider.Delete() call is made once against it. To tackle this in this PR, we remove InstanceTerminating status condition if, on cloudProvider.Get() we don't see deletion timestamp on the nodeClaim.

How was this change tested?
Added test for it.

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

[k8s-ci-robot]

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This pull-request has been approved by: jigisha620
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[k8s-ci-robot]

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[coveralls]

Pull Request Test Coverage Report for Build 13067881195

Details

• 12 of 14 (85.71%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.01%) to 81.125%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/utils/termination/termination.go	12	14	85.71%

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/node/termination/controller.go	2	71.65%

Totals
Change from base Build 13018314641:	-0.01%
Covered Lines:	9086
Relevant Lines:	11200

---

💛 - Coveralls