Add golangci-lint workflow (#4999)

* fix lint workflow

* add golang lint

* close http response body

pkg/apiserver/authorization/union/union.go

@@ -90,7 +90,7 @@ func (authzHandler unionAuthzRulesHandler) RulesFor(user user.Info, namespace st
 	for _, currAuthzHandler := range authzHandler {
 		resourceRules, nonResourceRules, incomplete, err := currAuthzHandler.RulesFor(user, namespace)
 
-		if incomplete == true {
+		if incomplete {
 			incompleteStatus = true
 		}
 		if err != nil {