Refactor from deepsource feedback (Continuous Benchmark codes)

[vankichi]

Description:

SSIA

Related Issue:

Versions:

• Go Version: 1.21.3
• Docker Version: 20.10.8
• Kubernetes Version: v1.28.2
• NGT Version: 2.1.3

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:

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	57f3ac6
Status:	✅  Deploy successful!
Preview URL:	https://cd3cc56b.vald.pages.dev
Branch Preview URL:	https://refactor-internal-pkg-refact.vald.pages.dev

View logs

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

• 🙆‍♀️ /approve - approve
• 🍱 /format - format codes and add licenses
• ✅ /gen-test - generate test codes
• 🏷️ /label - add labels
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
internal/sync/errgroup/group.go	89.00% <ø> (ø)
pkg/tools/benchmark/operator/service/operator.go	64.48% <88.88%> (-0.15%)	⬇️
pkg/tools/benchmark/operator/service/option.go	11.42% <0.00%> (ø)

... and 3 files with indirect coverage changes

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