Fix deepsource: CRT-A0014 switch single case can be rewritten if or if-else

[vankichi]

Description:

I have fixed CRT-A0014.

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:

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	fe50adb
Status:	✅  Deploy successful!
Preview URL:	https://478a7b31.vald.pages.dev
Branch Preview URL:	https://refactor-crt-a0014-switch-si.vald.pages.dev

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[codecov]

Codecov Report

Base: 30.54% // Head: 30.54% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (fe50adb) compared to base (d7345dc).
Patch coverage: 75.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1855   +/-   ##
=======================================
  Coverage   30.54%   30.54%           
=======================================
  Files         367      367           
  Lines       33823    33828    +5     
=======================================
+ Hits        10331    10333    +2     
- Misses      23079    23081    +2     
- Partials      413      414    +1     

Impacted Files	Coverage Δ
hack/helm/schema/crd/main.go	0.00% <0.00%> (ø)
hack/helm/schema/gen/main.go	0.00% <0.00%> (ø)
internal/cache/cache.go	100.00% <100.00%> (ø)
internal/cache/cacher/cacher.go	100.00% <100.00%> (ø)
...nt/core/ngt/service/vqueue/uninserted_index_map.go	70.43% <0.00%> (-3.23%)	⬇️
internal/errgroup/group.go	94.00% <0.00%> (-1.00%)	⬇️
internal/worker/worker.go	82.30% <0.00%> (-0.77%)	⬇️
internal/net/dialer.go	78.40% <0.00%> (+0.99%)	⬆️
...ent/core/ngt/service/vqueue/undeleted_index_map.go	73.77% <0.00%> (+2.18%)	⬆️

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[hlts2]

LGTM