Add ConstantValueKind to KtSimpleConstantValue

idea/idea-frontend-api/src/org/jetbrains/kotlin/idea/frontend/api/symbols/DebugSymbolRenderer.kt

@@ -58,7 +58,7 @@ object DebugSymbolRenderer {
             }
             "${value::class.simpleName!!}($symbolTag)"
         }
-        is KtSimpleConstantValue<*> -> renderValue(value.constant)
+        is KtSimpleConstantValue<*> -> renderValue(value.value)
         is KtNamedConstantValue -> "${renderValue(value.name)} = ${renderValue(value.expression)}"
         is KtAnnotationCall ->
             "${renderValue(value.classId)}${value.arguments.joinToString(prefix = "(", postfix = ")") { renderValue(it) }}"

idea/idea-frontend-api/src/org/jetbrains/kotlin/idea/frontend/api/symbols/markers/KtConstantValue.kt

@@ -5,7 +5,9 @@
 
 package org.jetbrains.kotlin.idea.frontend.api.symbols.markers
 
+import org.jetbrains.kotlin.types.ConstantValueKind
+
 sealed class KtConstantValue
 object KtUnsupportedConstantValue : KtConstantValue()
 
-data class KtSimpleConstantValue<T>(val constant: T?) : KtConstantValue()
+data class KtSimpleConstantValue<T>(val constantValueKind: ConstantValueKind<T>, val value: T) : KtConstantValue()