fix: use of ioutil package (#5261)

* fix ioutil.NopCloser

* fix ioutil.ReadAll

* fix ioutil.ReadFile

* fix ioutil.WriteFile

* run goimports -w -format-only ./

* update CHANGELOG.md

client/orm/cmd_utils_test.go

@@ -1,9 +1,10 @@
 package orm
 
 import (
+	"testing"
+
 	"github.com/beego/beego/v2/client/orm/internal/models"
 	"github.com/stretchr/testify/assert"
-	"testing"
 )
 
 func Test_getColumnTyp(t *testing.T) {

client/orm/orm_test.go

@@ -19,7 +19,6 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
-	"io/ioutil"
 	"math"
 	"os"
 	"path/filepath"
@@ -118,7 +117,7 @@ func getCaller(skip int) string {
 	pc, file, line, _ := runtime.Caller(skip)
 	fun := runtime.FuncForPC(pc)
 	_, fn := filepath.Split(file)
-	data, err := ioutil.ReadFile(file)
+	data, err := os.ReadFile(file)
 	var codes []string
 	if err == nil {
 		lines := bytes.Split(data, []byte{'\n'})