fix: parse fail in empty json(#37294)

[smellthemoon]

pr: #37294
issue: #37200

[mergify]

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

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.84%. Comparing base (6b9b699) to head (8d0d094).
Report is 3 commits behind head on 2.5.

Files with missing lines	Patch %	Lines
internal/core/src/common/Json.h	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.5   #37295      +/-   ##
==========================================
- Coverage   83.10%   80.84%   -2.27%     
==========================================
  Files        1031     1321     +290     
  Lines      157671   183092   +25421     
==========================================
+ Hits       131034   148012   +16978     
- Misses      21443    29871    +8428     
- Partials     5194     5209      +15     

Components	Coverage Δ
Client	∅ <ø> (∅)
Core	66.92% <50.00%> (∅)
Go	83.10% <ø> (-0.03%)	⬇️

Files with missing lines	Coverage Δ
internal/core/src/common/Json.h	67.90% <50.00%> (ø)

... and 315 files with indirect coverage changes

[smellthemoon]

/run-cpu-e2e

[mergify]

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

[smellthemoon]

/run-cpu-e2e

[mergify]

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

[smellthemoon]

/run-cpu-e2e

[mergify]

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

[smellthemoon]

/run-cpu-e2e

[smellthemoon]

rerun ut

[zhagnlu]

/lgtm

[congqixia]

/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, smellthemoon

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