fix: Handle differently ordered role parents.

[DanCardin]

• Handle differently ordered role parents.
• Handle complex view definitions who's pg-internal-normalized form did not match the source text (primarily due to schema qualification, parenthesis normalization, etc)
• Handle view constraints changes
• Add explicit register_as_model=True to opt into orm behavior
• Accept UniqueConstraint as input materialized view constraint type

[coveralls]

Pull Request Test Coverage Report for Build 4324298900

• 150 of 151 (99.34%) changed or added relevant lines in 11 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 96.707%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/sqlalchemy_declarative_extensions/view/base.py	100	101	99.01%
<!--	Total:	150	151	99.34%	-->

Totals
Change from base Build 4277844209:	0.2%
Covered Lines:	1662
Relevant Lines:	1717

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💛 - Coveralls