- Added support for single dimensional getForIndex() in CtorAndArgsProvider, making use cases that only use a single
   dimension cleaner.
- Some touch ups and added checks.
- Refactored internal implementation to separate out code that would be changed in intrinsic implementation.
- Added StructuredArrayIntrinsicSupport helper class to contain all operations that may be changed in optimized intrinsic JDK implementations.
- Added code to exercise additional dimensionality depths, including single dimension exercising of getForIndex() forms in CtorAndArgs variants.
- Changed to use single dimension form of getForIndex() in CtorAndArgsProvider