Is your feature request related to a problem? Please describe.
We are ready to start the CLI changes for supporting AAD Auth support for exporting and importing managed disks.

Describe the solution you'd like.
Currently for cli command "az disk create" and "az disk update",
add a new option "--data-access-auth-mode", and possible values are AzureActiveDirectory and None

Additional context
We are targeting public preview by the end of April and it will be good to have the CLI support by then.