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

scripts/build/release_publisher/externalrelease.go

@@ -2,7 +2,7 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"strings"
 	"time"
@@ -62,7 +62,7 @@ func (getHTTPContents) getContents(url string) (string, error) {
 	}
 
 	defer response.Body.Close()
-	all, err := ioutil.ReadAll(response.Body)
+	all, err := io.ReadAll(response.Body)
 	if err != nil {
 		return "", err
 	}

scripts/build/release_publisher/publisher.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"strings"
@@ -276,7 +276,7 @@ func (p *publisher) postRequest(url string, obj interface{}, desc string) error
 
 	if res.Body != nil {
 		defer res.Body.Close()
-		body, err := ioutil.ReadAll(res.Body)
+		body, err := io.ReadAll(res.Body)
 		if err != nil {
 			return err
 		}