Use kmeta.ChildName() to generate OIDC service account name

[xiangpingjiang]

Fixes #7470

Proposed Changes

Pre-review Checklist

• At least 80% unit test coverage
• E2E tests for any new behavior
• Docs PR for any user-facing impact
• Spec PR for any new API feature
• Conformance test for any change to the spec

Release Note

Use kmeta.ChildName() to generate OIDC service account name

Docs

[knative-prow]

Hi @xiangpingjiang. Thanks for your PR.

I'm waiting for a knative 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.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f9961d9) 75.55% compared to head (e1eeb2c) 75.55%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7521   +/-   ##
=======================================
  Coverage   75.55%   75.55%           
=======================================
  Files         261      261           
  Lines       14667    14668    +1     
=======================================
+ Hits        11082    11083    +1     
  Misses       3006     3006           
  Partials      579      579           

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[creydr]

/ok-to-test

[creydr]

Thanks for fixing this @xiangpingjiang

/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: creydr, xiangpingjiang

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