[Feature] Enable code formatting, go imports, linters in CI

[Jeffwan]

Search before asking

• I had searched in the issues and found no similar feature requirement.

Description

We may not always remember to do this work which results in inconsistent formatting issue.
Let's create the standard to help us maintain the code here.

• gofmt
• goimports
• golangci-lint

curl -sSfL https://github.com/raw/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.23.7

golangci-lint run  ./... # introduce linter config.yaml if necessary

I think the overall idea is to improve project quality. See suggestions here https://goreportcard.com/report/github.com/ray-project/kuberay

Use case

To avoid inconsistency issue from different contributors.

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

[Jeffwan]

I will keep this open. @feilengcui008 helps add linter and we still need to check fmt and goimports. If there's a difference, we should block the PR.

[Jeffwan]

/cc @wilsonwang371

[wilsonwang371]

Is this bug done?

[Jeffwan]

@wilsonwang371 which bug?

[Jeffwan]

golint has been marked as deprecated in golangci-lint. Above screenshot is not that helpful anymore. Default linter is good enough. golangci/golangci-lint#1892

[Jeffwan]

There're lots of failures after we enable linter against apiserver and cli.

[Jeffwan]

Those issues have been fixed in #158