Replaced deprecated calls (from go linter)

Author: cmaglie

legacy/builder/test/builder_utils_test.go

@@ -16,7 +16,7 @@
 package test
 
 import (
-	"io/ioutil"
+	"os"
 	"testing"
 	"time"
 
@@ -32,7 +32,7 @@ func sleep(t *testing.T) {
 }
 
 func tempFile(t *testing.T, prefix string) *paths.Path {
-	file, err := ioutil.TempFile("", prefix)
+	file, err := os.CreateTemp("", prefix)
 	file.Close()
 	NoError(t, err)
 	return paths.New(file.Name())

legacy/builder/test/helper_tools_downloader.go

@@ -19,7 +19,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"os/exec"
@@ -216,7 +215,7 @@ func downloadIndex(url string) (map[string]interface{}, error) {
 		return nil, err
 	}
 
-	bytes, err := ioutil.ReadAll(res.Body)
+	bytes, err := io.ReadAll(res.Body)
 	if err != nil {
 		return nil, err
 	}
@@ -632,7 +631,7 @@ func downloadAndUnpack(url string) (*paths.Path, []os.FileInfo, error) {
 		return nil, nil, errors.WithStack(err)
 	}
 
-	bytes, err := ioutil.ReadAll(res.Body)
+	bytes, err := io.ReadAll(res.Body)
 	if err != nil {
 		return nil, nil, errors.WithStack(err)
 	}

legacy/builder/test/read_file_and_store_in_context_test.go

@@ -16,7 +16,7 @@
 package test
 
 import (
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/arduino/arduino-cli/legacy/builder"
@@ -26,7 +26,7 @@ import (
 )
 
 func TestReadFileAndStoreInContext(t *testing.T) {
-	filePath, err := ioutil.TempFile("", "test")
+	filePath, err := os.CreateTemp("", "test")
 	NoError(t, err)
 
 	file := paths.New(filePath.Name())