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>

modules/templates/util_format.go

@@ -5,6 +5,7 @@ package templates
 
 import (
 	"fmt"
+	"strconv"
 
 	"code.gitea.io/gitea/modules/util"
 )
@@ -24,7 +25,7 @@ func countFmt(data any) string {
 		return ""
 	}
 	if num < 1000 {
-		return fmt.Sprintf("%d", num)
+		return strconv.FormatInt(num, 10)
 	} else if num < 1_000_000 {
 		num2 := float32(num) / 1000.0
 		return fmt.Sprintf("%.1fk", num2)