Split CompileTimeConstant into two entities

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

compiler/testData/diagnostics/tests/namedArguments/allowForJavaAnnotation.txt

@@ -1,6 +1,6 @@
 package
 
-A(x = IntegerValueType(1), y = "2") internal fun test(): kotlin.Unit
+A(x = 1, y = "2") internal fun test(): kotlin.Unit
 
 public final class A : kotlin.Annotation {
     public constructor A(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.String)