[K2, MPP] Correct actualization of nested objects

^KT-57182 Fixed

compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.fir.kt

@@ -1,16 +0,0 @@
-// MODULE: m1-common
-// FILE: common.kt
-
-expect sealed class Presence {
-    <!NO_ACTUAL_FOR_EXPECT{JVM}!>object Online: Presence<!>
-    <!NO_ACTUAL_FOR_EXPECT{JVM}!>object Offline: Presence<!>
-}
-
-// MODULE: m2-jvm()()(m1-common)
-// FILE: jvm.kt
-
-actual typealias Presence = P
-sealed class P {
-    object Online : P()
-    object Offline : P()
-}

compiler/testData/diagnostics/tests/multiplatform/sealedTypeAlias.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // MODULE: m1-common
 // FILE: common.kt