Use gzip instead of pigz in CI

[hakman]

What this PR does / why we need it:

CI tests are failing due to missing pigz binary.
Ref: #10335

Root cause tracked to new runner images being released without the pigz package installed:
actions/runner-images#8161.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

n/a

How Has This Been Tested?

n/a

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added unit and/or e2e tests to cover my changes.
• All new and existing tests passed.

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[hakman]

/kind failing-test

[longwuyuan]

/ok-to-test

[longwuyuan]

/priority important-soon
/lgtm

@tao12345666333 @strongjz if replacing pigz command with gzip command will not impact anywhere else, then PTAL and review/approve

[longwuyuan]

/triage accepted

[tao12345666333]

Thanks!

Replacing with gzip won't cause any issues except for some performance differences. I agree to replace with gzip so that we can prioritize ensuring that our CI is not affected by the missing pigz package in GitHub Actions. Once this issue is resolved, we can switch back to pigz.

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hakman, longwuyuan, tao12345666333

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[hakman]

Thanks @tao12345666333.
Maybe make sure you actually need pigz in this case, as the performance difference is only a few seconds (you can check the cache stage duration in CI).

[tao12345666333]

Yes. Perhaps we won't switch back to pigz again, it's just a small note.