Add ZADDITIONALASSETATTRIBUTES.ZORIGINATINGASSETIDENTIFIER property

[RhetTbull]

ZADDITIONALASSETATTRIBUTES.ZORIGINATINGASSETIDENTIFIER maps to the cloud_guid of the original asset for an asset in a traditional shared album. This allows one to map back to the original asset to determine whether an asset is in a shared library, etc.

Expose this in PhotoInfo

>>> selected[0].tables().ZADDITIONALASSETATTRIBUTES.ZORIGINATINGASSETIDENTIFIER
('AX/otmU6hKxlV6nQRy4GOldrNp5U',)

>>> selected[0].asdict()
{'albums': [], 'burst': False, 'cloud_guid': 'AX/otmU6hKxlV6nQRy4GOldrNp5U',