util: mock disk hang and slow in random fail tests

[xzhangxian1008]

What problem does this PR solve?

Issue Number: close #53923

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @xzhangxian1008. Thanks for your PR.

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[xzhangxian1008]

/cc @windtalker @yibin87

[windtalker]

LGTM

[yibin87]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: windtalker, yibin87

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-06-11 07:49:14.752083692 +0000 UTC m=+450908.805395616: ☑️ agreed by windtalker.
• 2024-06-11 08:11:36.402062536 +0000 UTC m=+452250.455374460: ☑️ agreed by yibin87.

[xzhangxian1008]

/retest

[tiprow]

@xzhangxian1008: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.