feat: add basic E2E test

[bzp2010]

Add CI-based E2E testing, which mainly includes HTTP server, ETCD server, MySQL data source support, etc.

[bzp2010]

Update

I have create CI workflow and ginkgo based testing framework. Below is the list of test cases that have been added.

Test Cases

• [x] Server
  • [x] HTTP: GET /version
• [x] MySQL
  • [x] Launch
  • [x] Connect
  • [x] KV Get

Suggest and Review

ping @tokers @starsz Please review it and point out the test cases that need to be added if necessary.

[bzp2010]

@starsz @zaunist Please re-review it, thanks.

[bzp2010]

@zaunist Please take a second look and help merge if there is no problem.

cc @tokers