Feature GRID-9731: Update Lightning Cloud.py Backend to Accept Drive Specs (2/2)

[rlizzo]

What does this PR do?

Implements the cloud dispatcher for works containing drives. In order to construct the Drive API spec object we keep a record of the drives attached to a Work through the Work.drives property. This will make it reasonable for the cloud dispatcher to iterate over the attached drives without the overhead of traversing every attribute of the object and worrying about potentially aliased drive classes (a particular issue I discovered during testing where isinstance(deepcopy(MagicMock(spec=Drive)), Drive) returns False

This PR is paired with #14002

Does your PR introduce any breaking changes? If yes, please list them.

No

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