refactor: support golangci-lint

[zyy17]

What's changed

1. Add .golangci.yaml and make lint;

2. Fix lint errors that are found by make lint;

3. Refine GitHub Actions(multiple minor changes):

   • Use the latest Go version;
   • Refine naming: linter -> lint;
   • Use ncipollo/release-action@v1 as release workflow;
   • Update golangci-lint version;
   • Release gtctl by only creating a version tag and use ncipollo/release-action to release artifacts'(same as greptimedb actions);

Related issues

• Bump Go version to the latest release #121
• Support golangci-lint to improve code quality #83

[codecov-commenter]

Codecov Report

Merging #130 (0230fec) into develop (eb80cbd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #130   +/-   ##
========================================
  Coverage    22.02%   22.02%           
========================================
  Files            8        8           
  Lines          940      940           
========================================
  Hits           207      207           
  Misses         677      677           
  Partials        56       56           

Files Changed	Coverage Δ
pkg/deployer/baremetal/artifacts.go	36.31% <ø> (ø)

[shawnh2]

lgtm