Support disable_notify and message options in add-devices command

[anoworl]

In addition to dg deploy command, I supported disable_notify and message options in dg add-devices command.

Checklist

• [x] dg add-devices --disable_notify
  • No email sent
• [x] dg add-devices --message hogehoge
  • Release note changed
• [x] dg add-devices -h

[anoworl]

Thank you!