Fix mapping of nullable generic underlying types of inline classes

#KT-32162 Fixed

compiler/testData/codegen/box/inlineClasses/funInterface/argumentICGeneric2.kt

@@ -0,0 +1,22 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class Result<T: Any>(val isSuccess: T?)
+
+fun interface ResultHandler<T: Any> {
+    fun onResult(result: Result<T>)
+}
+
+fun doSmth(resultHandler: ResultHandler<Boolean>) {
+    resultHandler.onResult(Result(true))
+}
+
+fun box(): String {
+    var res = "FAIL"
+    doSmth { result ->
+        res = if (result.isSuccess == true) "OK" else "FAIL 1"
+    }
+    return res
+}

compiler/testData/codegen/box/inlineClasses/funInterface/returnICGeneric2.kt

@@ -0,0 +1,20 @@
+// WITH_STDLIB
+// IGNORE_BACKEND: JVM
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class Result<T: Any>(val isSuccess: T?)
+
+fun interface ResultHandler<T: Any> {
+    fun onResult(): Result<T>
+}
+
+fun doSmth(resultHandler: ResultHandler<Boolean>): Result<Boolean> {
+    return resultHandler.onResult()
+}
+
+fun box(): String {
+    var res = doSmth { Result(true) }
+    return if (res.isSuccess == true) "OK" else "FAIL"
+}