Fix deepsource: GSC-G404 Audit the random number generation source (rand)

[datelier]

Description:

SSIA

Related Issue:

Versions:

• Go Version: 1.19.2
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 1.14.8

Checklist:

• I have read the CONTRIBUTING document and completed our CLA agreement.
• I have checked open Pull Requests for the similar feature or fixes?

Special notes for your reviewer:

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

• 🙆‍♀️ /approve - approve
• 💌 /changelog - replace the PR body by changelog details
• 🍱 /format - format codes and add licenses
• ✅ /gen-test - generate test codes
• 🏷️ /label - add labels
• ⏪ /rebase - rebase main
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[kpango]

LGTM

[codecov]

Codecov Report

Base: 30.55% // Head: 30.54% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (63e47de) compared to base (63e6fcd).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1839      +/-   ##
==========================================
- Coverage   30.55%   30.54%   -0.01%     
==========================================
  Files         367      367              
  Lines       33777    33777              
==========================================
- Hits        10320    10317       -3     
- Misses      23043    23047       +4     
+ Partials      414      413       -1     

Impacted Files	Coverage Δ
internal/test/data/vector/gen.go	93.40% <100.00%> (ø)
...ent/core/ngt/service/vqueue/undeleted_index_map.go	71.11% <0.00%> (-5.56%)	⬇️
internal/worker/queue.go	98.73% <0.00%> (-1.27%)	⬇️
internal/errgroup/group.go	94.00% <0.00%> (-1.00%)	⬇️
internal/worker/worker.go	82.30% <0.00%> (ø)
...nt/core/ngt/service/vqueue/uninserted_index_map.go	73.22% <0.00%> (+4.91%)	⬆️

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