Do not suggest "convert to object" for sealed sub-classes with state

So #KT-24816 Fixed

idea/testData/inspectionsLocal/convertSealedSubClassToObject/fakeState.kt.after

@@ -0,0 +1,18 @@
+// WITH_RUNTIME
+
+abstract class Base {
+    var s: String
+        get() = "Hello"
+        set(value) {}
+}
+
+sealed class Sealed : Base() {
+    open val x: List<Int>
+        get() = emptyList()
+}
+
+object Derived : Sealed() {
+    var length: Int
+        get() = s.length
+        set(value) {}
+}