fix: fix miss makezero bug

[alingse]

Ⅰ. Describe what this PR does

I was running github actions to run linter makezero for top github golang repos.

see issues alingse/go-linter-runner#1

and the github actions output https://github.com/alingse/go-linter-runner/actions/runs/9242658768/job/25425757534

====================================================================================================
append to slice `names` with non-zero initialized length at https://github.com/openkruise/kruise/blob/master/pkg/util/imagejob/imagejob_reader.go#L60:11
====================================================================================================

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

the names no need empty string value

Ⅳ. Special notes for reviews

[kruise-bot]

Welcome @alingse! It looks like this is your first PR to openkruise/kruise 🎉

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.04%. Comparing base (0d0031a) to head (91e3ef5).
Report is 35 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1628      +/-   ##
==========================================
+ Coverage   47.91%   49.04%   +1.12%     
==========================================
  Files         162      180      +18     
  Lines       23491    18803    -4688     
==========================================
- Hits        11256     9221    -2035     
+ Misses      11014     8371    -2643     
+ Partials     1221     1211      -10     

Flag	Coverage Δ
unittests	49.04% <100.00%> (+1.12%)	⬆️

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[furykerry]

/lgtm

[furykerry]

/approve

[kruise-bot]

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