refactor: write integration tests in Golang

[tisonkun]

Motivation

TCL scripts are hard for debugging. It helps to bring Redis tests but we can later refactor them for easy maintaining and debugging.

I ever try to write it in Rust #693 but finally propose this patch in Golang. As Rust's testing is less than mature and our contributors like @git-hulk & @torwig should be familiar with Golang. Also, go-redis project has a backlink to Kvrocks and when possibly, I'm glad to use it for Kvrocks' tests.

Implementation

1. Add go integration cases mod under tests/gocase.
2. Implement the start server logic at util/server.go
3. Migrate TCL test util/command to the new integration framework.
4. Wire logic to the CI workflow.

[git-hulk]

Thanks @tisonkun

The tcl is really hard to debug for myself. Go or Rust are good to me but I think Go will be easier for developers to learn and participate. Can see other guys have any feedback on this topic,

[git-hulk]

I looked through this PR and it’s clear enough for me. To see other guys have any questions? @PragmaTwice @ShooterIT @Alfejik @caipengbo

[PragmaTwice]

LGTM

[tisonkun]

It happens that I have some time to work on this migration. I'll merge this patch tomorrow if no more objections and continue the tasks.

Feel free to review after merge.