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/evaluate/usesVariableAsConstant/OtherTypes.kt

@@ -6,11 +6,17 @@ fun foo(): Boolean = true
 
 val x = 1
 
-// val prop1: null
+// val prop1: false
 val prop1 = MyEnum.A
 
 // val prop2: null
 val prop2 = foo()
 
 // val prop3: true
-val prop3 = "$x"
+val prop3 = "$x"
+
+// val prop4: false
+val prop4 = intArrayOf(1, 2, 3)
+
+// val prop5: true
+val prop5 = intArrayOf(1, 2, x, x)