Fix mapping of platform inline class types

For the inline class:
 ```
 inline class IC(val x: Int)
 ```

 Type (IC..IC?) should be mapped to the wrapper `IC`
 because it can hold object and also because it does so for primitives

 #KT-28983 Fixed

core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/typeSignatureMapping.kt

@@ -284,7 +284,7 @@ internal fun computeExpandedTypeInner(kotlinType: KotlinType, visitedClassifiers
             val underlyingType = kotlinType.substitutedUnderlyingType() ?: return null
             val expandedUnderlyingType = computeExpandedTypeInner(underlyingType, visitedClassifiers) ?: return null
             when {
-                !kotlinType.isMarkedNullable -> expandedUnderlyingType
+                !kotlinType.isNullable() -> expandedUnderlyingType
 
                 // Here inline class type is nullable. Apply nullability to the expandedUnderlyingType.