Handle ioutil deprecations (#53526)

* replace ioutil.ReadFile -> os.ReadFile

* replace ioutil.ReadAll -> io.ReadAll

* replace ioutil.TempFile -> os.CreateTemp

* replace ioutil.NopCloser -> io.NopCloser

* replace ioutil.WriteFile -> os.WriteFile

* replace ioutil.TempDir -> os.MkdirTemp

* replace ioutil.Discard -> io.Discard

pkg/services/provisioning/plugins/config_reader.go

@@ -73,7 +73,7 @@ func (cr *configReaderImpl) parsePluginConfig(path string, file os.FileInfo) (*p
 
 	// nolint:gosec
 	// We can ignore the gosec G304 warning on this one because `filename` comes from ps.Cfg.ProvisioningPath
-	yamlFile, err := ioutil.ReadFile(filename)
+	yamlFile, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, err
 	}