When ExecutionWholeArray is passed to a worklet, it is expected to
behave like an array portal. However, it was missing the
GetNumberOfValues method and the ValueType typedef. These are now added.
The constructor for execution whole array was wrong and would result in compilation error if used. This fixes that and adds a test path for testing ExecutionWholeArray with ExecutionWholeArrayConst.
This is built ontop of the ExecutionObjectBase work, and is designed to show
other developers how they can create custom objects that are shared among
all worklets, but are passed as parameters to the worklet.
