Convert Enum to Sealed Class: Support expect/actual classes

idea/testData/multiModuleQuickFix/convertExpectEnumToSealedClass/header/header.kt

@@ -0,0 +1,5 @@
+// "Convert to sealed class" "true"
+
+expect enum class <caret>E {
+    A, B, C
+}

idea/testData/multiModuleQuickFix/convertExpectEnumToSealedClass/header/header.kt.after

@@ -0,0 +1,7 @@
+// "Convert to sealed class" "true"
+
+expect sealed class <caret>E {
+    object A : E
+    object B : E
+    object C : E
+}