[NI] Add constrains even we try add constraint like TypeVariable <: CapturedType from subtyping.

If such captured type has lower type, then from TypeVariable <: lowerType => TypeVariable <: CapturedType.

core/descriptors/src/org/jetbrains/kotlin/types/checker/NewCapturedType.kt

@@ -122,7 +122,7 @@ enum class CaptureStatus {
 class NewCapturedType(
         val captureStatus: CaptureStatus,
         override val constructor: NewCapturedTypeConstructor,
-        val lowerType: UnwrappedType?,
+        val lowerType: UnwrappedType?, // todo check lower type for nullable captured types
         override val annotations: Annotations = Annotations.EMPTY,
         override val isMarkedNullable: Boolean = false
 ): SimpleType() {