chore: add minDrainTime

[ryan-mist]

Fixes #N/A

Description

• add minDrainTime to termination flow to ensure pods scheduled immediately after the taint is applied will still be drained

How was this change tested?

• make presubmit
• manual testing to ensure minDrainTime has passed before node termination

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

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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

Hi @ryan-mist. Thanks for your PR.

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[coveralls]

Pull Request Test Coverage Report for Build 20382512924

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• 63 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.02%) to 80.323%

---

Files with Coverage Reduction	New Missed Lines	%
pkg/controllers/state/informer/nodeclaim.go	9	68.57%
pkg/controllers/nodeclaim/lifecycle/controller.go	21	71.74%
pkg/state/cost/cost.go	33	74.55%

Totals
Change from base Build 20243170426:	0.02%
Covered Lines:	11871
Relevant Lines:	14779

---

💛 - Coveralls

[jmdeal]

Just a couple of small comments