[bugfix] disable vtproto pooling due to the performance degradation

[kpango]

Description:

Related Issue:

Versions:

• Go Version: 1.20.3
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 2.0.11

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]

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[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	719433c
Status:	✅  Deploy successful!
Preview URL:	https://4ef54bc2.vald.pages.dev
Branch Preview URL:	https://bugfix-vtpool-disable-poolin.vald.pages.dev

View logs

[codecov]

Codecov Report

Patch coverage: 41.37% and project coverage change: +0.02 🎉

Comparison is base (02927a3) 29.94% compared to head (719433c) 29.96%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2063      +/-   ##
==========================================
+ Coverage   29.94%   29.96%   +0.02%     
==========================================
  Files         369      369              
  Lines       35092    35046      -46     
==========================================
- Hits        10507    10502       -5     
+ Misses      24104    24064      -40     
+ Partials      481      480       -1     

Impacted Files	Coverage Δ
internal/net/grpc/client.go	0.00% <0.00%> (ø)
pkg/discoverer/k8s/handler/grpc/handler.go	0.00% <0.00%> (ø)
internal/net/grpc/codec.go	77.77% <75.00%> (+5.05%)	⬆️

... and 3 files with indirect coverage changes

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[hlts2]

LGTM

[kmrmt]

LGTM

[github-actions]

[FOSSA] The scan result will be available at https://app.fossa.com/projects/custom%2B21465%2Fvald/refs/branch/bugfix%2Fvtpool%2Fdisable-pooling/e9c3c53cd4f5d539c23af508dacbbccf8360fc1b

[vdaas-ci]

Profile Report

type	vald-agent-ngt	vald-lb-gateway	vald-discoverer	vald-manager-index
cpu
heap

other images