test/framework: replace deprecated ioutil.ReadAll

[komisan19]

Issue

Description

This package is deprecated.
so, change to io/ioutil -> io

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[k8s-ci-robot]

Hi @komisan19. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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/test-infra repository.

[johngmyers]

/ok-to-test
/lgtm
/assign @kishorj

[kishorj]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, komisan19

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [kishorj]

Approvers can indicate their approval by writing /approve in a comment
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[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (940efc7) 54.70% compared to head (f71604c) 54.70%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3256   +/-   ##
=======================================
  Coverage   54.70%   54.70%           
=======================================
  Files         148      148           
  Lines        8590     8590           
=======================================
  Hits         4699     4699           
  Misses       3559     3559           
  Partials      332      332           

☔ View full report in Codecov by Sentry.
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[kishorj]

/retest