1. ConstantValue
* just holds some value and its type
* implementations for concrete constants
2. CompileTimeConstant
* is only produced by ConstantExpressionEvaluator
* has additional flags (canBeUsedInAnnotation etc)
* has two implementations TypedCompileTimeConstant containing a constant value
and IntegerValueConstant which does not have exact type
* can be converted to ConstantValue
Adjustt usages to use ConstantValue if flags are not needed
Add tests for some uncovered cases
Annotation arguments with default values are rendered as ... if renderDefaultAnnotationArguments is true.
Tests: java retention does not taken into account by Descriptor comparator.
Java retentinon changed to kotlin retention in some tests + one new test with java retention added.
More accurate tests for intentions in byte code (visibility controlled).
Mikhail Glukhikh