fix: move pod ack to when pod is first seen by Karpenter

[rschalo]

Fixes #N/A

Description
This change includes the time a pod spent waiting for batching in pod scheduling duration.

How was this change tested?
Unit test.

Example in metrics change for single pod:

before moving ackPods
karpenter_pods_scheduling_decision_duration_seconds_bucket{le="0.05"} 0
karpenter_pods_scheduling_decision_duration_seconds_bucket{le="0.1"} 1

after moving ackPods

karpenter_pods_scheduling_decision_duration_seconds_bucket{le="1"} 0
karpenter_pods_scheduling_decision_duration_seconds_bucket{le="1.25"} 1

Moving ackPods has added the 1 second coming from maxIdleBatching to the total time it takes to schedule.

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

[jonathan-innis]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[jonathan-innis]

/hold

Can you add an example/some data around how this changes our metrics?

[coveralls]

Pull Request Test Coverage Report for Build 12241208968

Details

• 4 of 5 (80.0%) changed or added relevant lines in 2 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.2%) to 80.875%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/controllers/controllers.go	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
pkg/utils/termination/termination.go	2	92.31%

Totals
Change from base Build 12208826786:	0.2%
Covered Lines:	8948
Relevant Lines:	11064

---

💛 - Coveralls

[jonathan-innis]

/unhold

Description was updated and tested