Enable addtional linters (#34085)

enable mirror, usestdlibbars and perfsprint 
part of: https://github.com/go-gitea/gitea/issues/34083

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/common/db.go

@@ -5,7 +5,7 @@ package common
 
 import (
 	"context"
-	"fmt"
+	"errors"
 	"time"
 
 	"code.gitea.io/gitea/models/db"
@@ -25,7 +25,7 @@ func InitDBEngine(ctx context.Context) (err error) {
 	for i := 0; i < setting.Database.DBConnectRetries; i++ {
 		select {
 		case <-ctx.Done():
-			return fmt.Errorf("Aborted due to shutdown:\nin retry ORM engine initialization")
+			return errors.New("Aborted due to shutdown:\nin retry ORM engine initialization")
 		default:
 		}
 		log.Info("ORM engine initialization attempt #%d/%d...", i+1, setting.Database.DBConnectRetries)

routers/common/markup.go

@@ -88,7 +88,7 @@ func RenderMarkup(ctx *context.Base, ctxRepo *context.Repository, mode, text, ur
 		})
 		rctx = rctx.WithMarkupType("").WithRelativePath(filePath) // render the repo file content by its extension
 	default:
-		ctx.HTTPError(http.StatusUnprocessableEntity, fmt.Sprintf("Unknown mode: %s", mode))
+		ctx.HTTPError(http.StatusUnprocessableEntity, "Unknown mode: "+mode)
 		return
 	}
 	rctx = rctx.WithUseAbsoluteLink(true)