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Automatic merge from submit-queue close channel to prevent buildup of wait.JitterUntil() <!-- Checklist for submitting a Pull Request Please remove this comment block before submitting. 1. Please read our [contributor guidelines](https://github.com/kubernetes/kubernetes/blob/master/CONTRIBUTING.md). 2. See our [developer guide](https://github.com/kubernetes/kubernetes/blob/master/docs/devel/development.md). 3. If you want this PR to automatically close an issue when it is merged, add `fixes #<issue number>` or `fixes #<issue number>, fixes #<issue number>` to close multiple issues (see: https://github.com/blog/1506-closing-issues-via-pull-requests). 4. Follow the instructions for [labeling and writing a release note for this PR](https://github.com/kubernetes/kubernetes/blob/master/docs/devel/pull-requests.md#release-notes) in the block below. --> Trying to look at flake in #26377 by running the test with large counts of runs. It was timing out because a `wait.JitterUntil` goroutine builds up for each of the four tests. So if you ran it a thousand times, you would end up with 4k goroutines spinning in the background. Now I create a channel and close it at the end of each test to prevent a memory leak.