Feat: Add workflows CI && Fix ci

[bwangelme]

Feat

add github workflow ci

Fix

The reason for ci block can be found in https://github.com/silenceper/pool/issues/38

ErrMaxActiveConnReached is hard to reproduce, So I delete the test case for check ErrMaxActiveConnReached

TODO

Due to too many lint errors, I temporarily closed golang lint CI. We can slowly repair it in th future.

[bwangelme]

It works on my repo: https://github.com/bwangelme/pool/actions/workflows/go.yaml

Why workflow doesn't work here?