Add --version flag for cloudbase-init cli

Registered by Adrian Vladu

when you run cloudbase-init binary, you should be able to retrieve the version:
>> ./cloudbase-init.exe --version
>> 0.9.11

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Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Adrian Vladu
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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