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/tsdb/cloudwatch/response_parser_test.go

@@ -2,7 +2,7 @@ package cloudwatch
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 	"testing"
@@ -17,7 +17,7 @@ import (
 func loadGetMetricDataOutputsFromFile(filePath string) ([]*cloudwatch.GetMetricDataOutput, error) {
 	var getMetricDataOutputs []*cloudwatch.GetMetricDataOutput
 	cleanFilePath := filepath.Clean(filePath)
-	jsonBody, err := ioutil.ReadFile(cleanFilePath)
+	jsonBody, err := os.ReadFile(cleanFilePath)
 	if err != nil {
 		return getMetricDataOutputs, err
 	}