Move: Fix reference binding for the case of default target package

#KT-6457 Fixed

idea/testData/refactoring/move/kotlin/moveTopLevelDeclarations/misc/moveClassFromDefaultPackage/after/Y.kt

@@ -0,0 +1,4 @@
+class Y {
+    fun foo() {
+    }
+}

idea/testData/refactoring/move/kotlin/moveTopLevelDeclarations/misc/moveClassFromDefaultPackage/after/a/X.kt

@@ -0,0 +1,7 @@
+package a
+
+class X: Y() {
+    fun main() {
+        Y().foo()
+    }
+}

idea/testData/refactoring/move/kotlin/moveTopLevelDeclarations/misc/moveClassFromDefaultPackage/before/X.kt

@@ -0,0 +1,5 @@
+class <caret>X: Y() {
+    fun main() {
+        Y().foo()
+    }
+}

idea/testData/refactoring/move/kotlin/moveTopLevelDeclarations/misc/moveClassFromDefaultPackage/before/Y.kt

@@ -0,0 +1,4 @@
+class Y {
+    fun foo() {
+    }
+}

idea/testData/refactoring/move/kotlin/moveTopLevelDeclarations/misc/moveClassFromDefaultPackage/moveClassFromDefaultPackage.test

@@ -0,0 +1,5 @@
+{
+  "mainFile": "X.kt",
+  "type": "MOVE_KOTLIN_TOP_LEVEL_DECLARATIONS",
+  "targetPackage": "a"
+}