Move: Use Kotlin declaration mover to handle KtFile

IDEA-provided file mover does not process conflicts

 #KT-13911 Fixed

idea/testData/refactoring/moveHandler/declarations/objectLiteral/test.kt

@@ -0,0 +1,7 @@
+open class A
+
+fun foo() {
+    val o = <caret>object : A() {
+
+    }
+}