storage: stop using deprecated io/ioutil

This replaces deprecated ioutil variables and functions as follows:

* ioutil.ReadDir -> os.ReadDir
* ioutil.ReadFile -> os.ReadFile
* ioutil.TempDir -> os.MkdirTemp
* ioutil.TempFile -> os.CreateTemp
* ioutil.WriteFile -> os.WriteFile

The ReadDir conversion involves an API change, the replacement
function returns a slice of fs.DirEntry instead of fs.FileInfo.
Where appropriate, the surrounding code has been adjusted; mostly,
that means using DirEntry.Type() instead of FileInfo.Mode().
Applying this change to the IoUtil interface would mean changing its
API, so this is left for later.

Signed-off-by: Stephen Kitt <skitt@redhat.com>

pkg/volume/util/volumepathhandler/volume_path_handler.go

@@ -18,7 +18,6 @@ package volumepathhandler
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -279,12 +278,12 @@ func (v VolumePathHandler) IsDeviceBindMountExist(mapPath string) (bool, error)
 // GetDeviceBindMountRefs searches bind mounts under global map path
 func (v VolumePathHandler) GetDeviceBindMountRefs(devPath string, mapPath string) ([]string, error) {
 	var refs []string
-	files, err := ioutil.ReadDir(mapPath)
+	files, err := os.ReadDir(mapPath)
 	if err != nil {
 		return nil, err
 	}
 	for _, file := range files {
-		if file.Mode()&os.ModeDevice != os.ModeDevice {
+		if file.Type()&os.ModeDevice != os.ModeDevice {
 			continue
 		}
 		filename := file.Name()