mysqlctl: Reduce logging for running commands (#13659)

Signed-off-by: Dirkjan Bussink <d.bussink@gmail.com>

go/vt/mysqlctl/mysqld.go

@@ -575,7 +575,6 @@ func (mysqld *Mysqld) Shutdown(ctx context.Context, cnf *Mycnf, waitForMysqld bo
 // If input is not nil, pipe it to the command's stdin.
 func execCmd(name string, args, env []string, dir string, input io.Reader) (cmd *exec.Cmd, output string, err error) {
 	cmdPath, _ := exec.LookPath(name)
-	log.Infof("execCmd: %v %v %v", name, cmdPath, args)
 
 	cmd = exec.Command(cmdPath, args...)
 	cmd.Env = env
@@ -586,10 +585,9 @@ func execCmd(name string, args, env []string, dir string, input io.Reader) (cmd
 	out, err := cmd.CombinedOutput()
 	output = string(out)
 	if err != nil {
-		log.Infof("execCmd: %v failed: %v", name, err)
-		err = fmt.Errorf("%v: %v, output: %v", name, err, output)
+		log.Errorf("execCmd: %v failed: %v", name, err)
+		err = fmt.Errorf("%v: %w, output: %v", name, err, output)
 	}
-	log.Infof("execCmd: %v output: %v", name, output)
 	return cmd, output, err
 }