Creating at least one privacy declaration without a name causes validation errors

[NevilleS]

From fideslang created by allisonking: IABTechLab#98

Bug Description

Creating at least one privacy declaration without a name causes validation errors

Steps to Reproduce

In a python repl...

>>> from fideslang import System, PrivacyDeclaration
>>> p = PrivacyDeclaration(data_categories=[], data_use="test", data_subjects=[])
>>> p2 = PrivacyDeclaration(data_categories=[], data_use="test", data_subjects=[])
>>> s = System(fides_key="s", system_type="s" privacy_declarations=[p, p2])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "pydantic/main.py", line 331, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 1 validation error for System
privacy_declarations
  '<' not supported between instances of 'NoneType' and 'NoneType' (type=type_error)

Doing just one privacy declaration works okay, perhaps because this sort doesn't need to compare

Expected behavior

Be able to make multiple privacy declarations without names without problems

Screenshots

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Environment

• Version:
• OS:
• Python Version:
• Docker Version:

Additional context

There's a number of ways we could fix this, considering name is being deprecated:

• Remove the sort
• Sort on data_use instead
• Default name to ""

I'm not sure what the best way is, open to suggestions!