Support CASE Expressions in ORDER BY Phrases

[jeffgbutler]

This PR has two main features:

1. Rendering of ORDER BY phrases is refactored to allow access to the parameter map by implementing a more general renderForOrderBy method that returns FragmentAndParameters. Any user provided implementations of SortSpecification will be affected - two existing methods are deprecated in favor of the new rendering strategy.
2. Case expressions are updated to support their inclusion in an order by phrase
3. The PR also includes several code cleanup items after the move to Java 17

Resolves #821

[coveralls]

coverage: 100.0%. remained the same
when pulling dca5d3d on jeffgbutler:case-in-order-by
into 028da50 on mybatis:master.