Check the length of JSON

[yah01]

/kind improvement
related #23389

[mergify]

@yah01 ut workflow job failed, comment rerun ut can trigger the job again.

[mergify]

@yah01 E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[codecov]

Codecov Report

Merging #24035 (69f1543) into master (ab95754) will increase coverage by 0.00%.
The diff coverage is 77.27%.

@@           Coverage Diff            @@
##           master   #24035    +/-   ##
========================================
  Coverage   82.08%   82.08%            
========================================
  Files         754      754            
  Lines       98430    98539   +109     
========================================
+ Hits        80794    80885    +91     
- Misses      14646    14662    +16     
- Partials     2990     2992     +2     

Impacted Files	Coverage Δ
internal/proxy/validate_util.go	90.34% <66.66%> (-2.79%)	⬇️
pkg/util/paramtable/component_param.go	97.91% <100.00%> (+<0.01%)	⬆️

... and 27 files with indirect coverage changes

[jiaoew1991]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jiaoew1991, yah01

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• internal/proxy/OWNERS [jiaoew1991]
• pkg/util/OWNERS [jiaoew1991]

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