chore: remove refs to deprecated io/ioutil (#2717)

Signed-off-by: guoguangwu <guoguangwu@magic-shield.com>

common/buf/multi_buffer_test.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"crypto/rand"
 	"io"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -120,7 +119,7 @@ func TestMultiBufferReadAllToByte(t *testing.T) {
 		common.Must(err)
 		f.Close()
 
-		cnt, err := ioutil.ReadFile(dat)
+		cnt, err := os.ReadFile(dat)
 		common.Must(err)
 
 		if d := cmp.Diff(buf2, cnt); d != "" {

common/cmdarg/arg.go

@@ -3,7 +3,7 @@ package cmdarg
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
+	"os"
 )
 
 // LoadArg loads one arg, maybe an remote url, or local file path
@@ -18,7 +18,7 @@ func LoadArg(arg string) (out io.Reader, err error) {
 
 // LoadArgToBytes loads one arg to []byte, maybe an remote url, or local file path
 func LoadArgToBytes(arg string) (out []byte, err error) {
-	out, err = ioutil.ReadFile(arg)
+	out, err = os.ReadFile(arg)
 	if err != nil {
 		return
 	}

common/log/logger_test.go

@@ -1,7 +1,6 @@
 package log_test
 
 import (
-	"io/ioutil"
 	"os"
 	"strings"
 	"testing"
@@ -13,7 +12,7 @@ import (
 )
 
 func TestFileLogger(t *testing.T) {
-	f, err := ioutil.TempFile("", "vtest")
+	f, err := os.CreateTemp("", "vtest")
 	common.Must(err)
 	path := f.Name()
 	common.Must(f.Close())