Add windows ssh

[Cristi1324]

Summary

• [windows_minion] connection_type defaults to ssh.
• ssh uses port 22. winrm uses port 5986.
• A missing port still selects WinRM.
• A minion that is already deployed keeps the port saved in connection_info.
• OS morphing uses SSH when the port is not 5986, and WinRM when the port is 5986.
• poll_instance_until_reachable() follows that same port rule. SSH runs exit 0. WinRM runs whoami.
• Core returns the OpenSSH guest script. The provider runs that script and opens TCP 22.