[FEATURE] Upgrade github.com/go-kit/kit to 0.12.0

[zhan9san]

Is your feature request related to a problem? Please describe.

Related to #298

If github.com/go-kit/kit is upgraded to 0.12.0, there are some incompatible change. So we need make some changes in code base as well.

  Running [/home/runner/golangci-lint-1.52.2-linux-amd64/golangci-lint run --out-format=github-actions --timeout=2m30s] in [] ...
  Error: Error return value of `(github.com/go-kit/log.Logger).Log` is not checked (errcheck)
  Error: Error return value of `(github.com/go-kit/log.Logger).Log` is not checked (errcheck)
  Error: Error return value of `logger.Log` is not checked (errcheck)
  Error: Error return value of `logger.Log` is not checked (errcheck)
  Error: Error return value of `logger.Log` is not checked (errcheck)
  Error: SA1019: "github.com/go-kit/kit/log" is deprecated: Use github.com/go-kit/log instead. (staticcheck)
  Error: SA1019: "github.com/go-kit/kit/log/level" is deprecated: Use github.com/go-kit/log/level instead. (staticcheck)
  Error: SA1019: "github.com/go-kit/kit/log" is deprecated: Use github.com/go-kit/log instead. (staticcheck)
  Error: Error return value of `l.logger.Log` is not checked (errcheck)
  Error: Error return value of `l.logger.Log` is not checked (errcheck)
  Error: Error return value of `l.logger.Log` is not checked (errcheck)
  Error: SA1019: "github.com/go-kit/kit/log" is deprecated: Use github.com/go-kit/log instead. (staticcheck)
  Error: Error return value of `(github.com/go-kit/log.Logger).Log` is not checked (errcheck)
  Error: SA1019: "github.com/go-kit/kit/log/level" is deprecated: Use github.com/go-kit/log/level instead. (staticcheck)
  Error: SA1019: "github.com/go-kit/kit/log/level" is deprecated: Use github.com/go-kit/log/level instead. (staticcheck)

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.