[Identity] `az identity revoke`: Add a command to revoke all tokens issued in the past for a specified user assigned identity

[RamyaElangovanP]

…preview API version

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[azure-client-tools-bot-prd[bot]]

Validation for Breaking Change Starting...

Thanks for your contribution!

[yonzhan]

Thank you for your contribution! We will review the pull request and get back to you soon.

[zhoxing-ms]

@RamyaElangovanP Please resolve these CI issues