Merge pull request #32046 from guangxuli/close_readBytesFromFile

Automatic merge from submit-queue

close the open file

the open file should be close.

test/e2e/kubectl.go

@@ -1527,7 +1527,7 @@ func readBytesFromFile(filename string) []byte {
 	if err != nil {
 		framework.Failf(err.Error())
 	}
-
+	defer file.Close()
 	data, err := ioutil.ReadAll(file)
 	if err != nil {
 		framework.Failf(err.Error())