Add an abstract json layout to make it's easier to change json library (#16528)

* Add an abstract json layout to make it's easier to change json library

* Fix import

* Fix import sequence

* Fix blank lines

* Fix blank lines

integrations/testlogger.go

@@ -14,9 +14,9 @@ import (
 	"testing"
 	"time"
 
+	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/queue"
-	jsoniter "github.com/json-iterator/go"
 )
 
 var (
@@ -158,7 +158,6 @@ func NewTestLogger() log.LoggerProvider {
 // Init inits connection writer with json config.
 // json config only need key "level".
 func (log *TestLogger) Init(config string) error {
-	json := jsoniter.ConfigCompatibleWithStandardLibrary
 	err := json.Unmarshal([]byte(config), log)
 	if err != nil {
 		return err