handle empty array search/query result

[shanghaikid]

In this pr, it fixes that the search/query will be failed if the data contains empty array.

[codecov]

Codecov Report

Attention: 16 lines in your changes are missing coverage. Please review.

Comparison is base (5d805b9) 95.57% compared to head (a0e75b3) 95.15%.
Report is 3 commits behind head on main.

❗ Current head a0e75b3 differs from pull request most recent head 4edbc18. Consider uploading reports for the commit 4edbc18 to get more accurate results

Files	Patch %	Lines
milvus/HttpClient.ts	75.67%	9 Missing ⚠️
milvus/http/Vector.ts	46.15%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #257      +/-   ##
==========================================
- Coverage   95.57%   95.15%   -0.43%     
==========================================
  Files          37       39       +2     
  Lines        1742     1838      +96     
  Branches      453      436      -17     
==========================================
+ Hits         1665     1749      +84     
- Misses         70       86      +16     
+ Partials        7        3       -4     

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[sre-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: nameczz, shanghaikid

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