Ensure commits are signed in scripts/release.sh

[jmhbnz]

Address #18581 in main.

We need to also backport it to release-3.5.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.79%. Comparing base (6c1fe4a) to head (0c2f47d).

❗ Current head 0c2f47d differs from pull request most recent head 7e8e0bf

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Additional details and impacted files

see 23 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #18592      +/-   ##
==========================================
- Coverage   68.83%   68.79%   -0.05%     
==========================================
  Files         420      420              
  Lines       35474    35474              
==========================================
- Hits        24419    24404      -15     
- Misses       9636     9646      +10     
- Partials     1419     1424       +5     

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[ahrtr]

LGTM

Thanks @jmhbnz

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, henrybear327, jmhbnz, serathius

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[jmhbnz]

/cherrypick release-3.5

[k8s-infra-cherrypick-robot]

@jmhbnz: new pull request created: #18599

In response to this:

/cherrypick release-3.5

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