Remove ioutil.ReadDir from usage (#53550)

* add depguard rule for ioutil

* replace ioutil.ReadDir with os.ReadDir

* use legacy option in depguard supported in golangci-lint v1.40

* replace ioutil.ReadDir with os.ReadDir

* return error for file info

pkg/cmd/grafana-cli/models/model.go

@@ -1,6 +1,7 @@
 package models
 
 import (
+	"io/fs"
 	"os"
 )
 
@@ -49,6 +50,6 @@ type PluginRepo struct {
 type IoUtil interface {
 	Stat(path string) (os.FileInfo, error)
 	RemoveAll(path string) error
-	ReadDir(path string) ([]os.FileInfo, error)
+	ReadDir(path string) ([]fs.DirEntry, error)
 	ReadFile(filename string) ([]byte, error)
 }