Introduce Type Alias: Fix replacement of references to nested classes

#KT-15159 Fixed

idea/testData/refactoring/introduceTypeAlias/deeplyNestedClass.kt

@@ -0,0 +1,19 @@
+// NAME: Aliased
+open class Outer{
+    open class Middle {
+        open class Nested
+    }
+}
+
+fun f2(){
+    val o3 = Outer.Middle.Nested() // (1)
+}
+
+val g3: <caret>Outer.Middle.Nested = Outer.Middle.Nested() //(2)
+
+fun f3(p: Outer.Middle.Nested): Outer.Middle.Nested = p
+
+class Outer3 : Outer.Middle.Nested()
+class Outer2 {
+    class Nested2 : Outer.Middle.Nested()
+}

idea/testData/refactoring/introduceTypeAlias/deeplyNestedClass.kt.after

@@ -0,0 +1,22 @@
+// NAME: Aliased
+open class Outer{
+    open class Middle {
+        open class Nested
+    }
+}
+
+fun f2(){
+    val o3 = Aliased() // (1)
+}
+
+typealias Aliased = Outer.Middle.Nested
+
+val g3: Aliased = Aliased() //(2)
+
+fun f3(p: Aliased): Aliased = p
+
+class Outer3 : Aliased()
+class Outer2 {
+    class Nested2 : Aliased()
+}
+

idea/testData/refactoring/introduceTypeAlias/nestedClass.kt

@@ -0,0 +1,17 @@
+// NAME: Aliased
+open class Outer{
+    open class Nested
+}
+
+fun f2(){
+    val o3 = Outer.Nested() // (1)
+}
+
+val g3: <caret>Outer.Nested = Outer.Nested() //(2)
+
+fun f3(p: Outer.Nested): Outer.Nested = p
+
+class Outer3 : Outer.Nested()
+class Outer2 {
+    class Nested2 : Outer.Nested()
+}

idea/testData/refactoring/introduceTypeAlias/nestedClass.kt.after

@@ -0,0 +1,20 @@
+// NAME: Aliased
+open class Outer{
+    open class Nested
+}
+
+fun f2(){
+    val o3 = Aliased() // (1)
+}
+
+typealias Aliased = Outer.Nested
+
+val g3: Aliased = Aliased() //(2)
+
+fun f3(p: Aliased): Aliased = p
+
+class Outer3 : Aliased()
+class Outer2 {
+    class Nested2 : Aliased()
+}
+