fix: check array field data is nil before getting the type

[sunby]

issue: #33074

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[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 83.10%. Comparing base (0abc0d0) to head (0a1cc67).
Report is 3 commits behind head on 2.3.

Additional details and impacted files

@@            Coverage Diff             @@
##              2.3   #33119      +/-   ##
==========================================
- Coverage   83.10%   83.10%   -0.01%     
==========================================
  Files         850      850              
  Lines      106596   106641      +45     
==========================================
+ Hits        88586    88622      +36     
- Misses      14710    14714       +4     
- Partials     3300     3305       +5     

Files	Coverage Δ
internal/proxy/validate_util.go	89.38% <16.66%> (-2.53%)	⬇️

... and 15 files with indirect coverage changes

[sunby]

/kind branch-feature

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[sunby]

/run-cpu-e2e

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[xiaofan-luan]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sunby, xiaofan-luan

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