Test update for adding nil value to list

[miledxz]

Comprehensive Summary of your change

Update for src/jobservice/common/list/list_test.go to test does list length increases when pushing nil value

Please indicate you've done the following:

• Well Written Title and Summary of the PR
• Label the PR as needed. "release-note/ignore-for-release, release-note/new-feature, release-note/update, release-note/enhancement, release-note/community, release-note/breaking-change, release-note/docs, release-note/infra, release-note/deprecation"
• Accepted the DCO. Commits without the DCO will delay acceptance.
• Made sure tests are passing and test coverage is added if needed.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed in website repository.

[Copilot]

Pull Request Overview

This PR adds a new test case to verify that pushing a nil value does not increase the length of the list.

• Adds TestPushNil in list_test.go to confirm that the list length remains unchanged when a nil value is pushed.

[chlins]

lgtm

[Vivekgaddigi]

@miledxz Update the branch
lgtm

[wy65701436]

lgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.45%. Comparing base (c8c11b4) to head (8569afe).
Report is 478 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21990      +/-   ##
==========================================
+ Coverage   45.36%   46.45%   +1.08%     
==========================================
  Files         244      253       +9     
  Lines       13333    14238     +905     
  Branches     2719     2925     +206     
==========================================
+ Hits         6049     6614     +565     
- Misses       6983     7272     +289     
- Partials      301      352      +51     

Flag	Coverage Δ
unittests	46.45% <ø> (+1.08%)	⬆️

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see 178 files with indirect coverage changes

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