[Connectedmachine] Added a property in az connectedmachine extension create/update

[dorothyhu]

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• Have you run python scripts/ci/test_index.py -q locally?

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[yonzhan]

Connectedmachine

[zhoxing-ms]

If you want to upgrade a new version to release this change, please update the setup.py file

[zhoxing-ms]

Could you add some tests for this new parameter?

[zhoxing-ms]

• FAIL - HIGH severity: option_length_too_long
  Parameter: connectedmachine extension create, enable_automatic_upgrade - The lengths of all options ['--enable-automatic-upgrade'] are longer than threshold 22. Argument enable_automatic_upgrade must have a short abbreviation.
  Parameter: connectedmachine extension update, enable_automatic_upgrade - The lengths of all options ['--enable-automatic-upgrade'] are longer than threshold 22. Argument enable_automatic_upgrade must have a short abbreviation.

Could you please address the linter issues？ You need to consider adding a short alias for this parameter