[SSH] Clean up credentials and support local user login

[vthiebaut10]

• Credentials Clean-up
  • az ssh vm
    • Save generated keys and certificates to a temporary folder. Once connection is established or after 2 minutes, delete all keys.
  • az ssh config
    • Save generated credentials to a default folder in the same location as the config file. For example:
      az ssh config --ip 1.2.3.4 --file /home/user/.ssh/myconfig will save credentials to the following directory /home/user/.ssh/az_ssh_config/1.2.3.4.
    • A warning to remind user to delete generated keys once they are no longer being used will be printed to the console.
    • New parameter --keys-destination-folder allow users to decide where generated keys and certs will be saved.
  • az ssh cert
    • User can no longer run command with no parameters.
    • If user only provides --file, new keys are saved in the same location as the new cert.
• Support local user login for both ssh vm and ssh config.
  • To login to a local account instead of an AAD account. Simply provide --local-user parameter.
  • For key based authentication, provide --private-key-file/-i
  • For certificate based authentication, provide --private-key-file/-i and --certificate-file/-c.
  • For password based authentication, don't provide any credentials.

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[bagajjal]

I think we should change this. With GA, we no longer should say Beta

[bagajjal]

Surprised to see the License type is MIT license instead of Microsoft public license (Ms-PL).
Is it a common norm for Az cli to use MIT license?

[yonzhan]

SSH

[bagajjal]

Hello, can someone please approve this PR. IT's been 12 days but there is no response