Rename: Report redeclaration conflict between class and type alias

 #KT-22751 Fixed

Author: asedunov

idea/src/org/jetbrains/kotlin/idea/refactoring/rename/renameConflictUtils.kt

@@ -99,7 +99,7 @@ internal fun checkRedeclarations(
 
     fun MemberScope.findSiblingsByName(): List<DeclarationDescriptor> {
         val descriptorKindFilter = when (descriptor) {
-            is ClassDescriptor -> DescriptorKindFilter.CLASSIFIERS
+            is ClassifierDescriptor -> DescriptorKindFilter.CLASSIFIERS
             is PropertyDescriptor -> DescriptorKindFilter.VARIABLES
             is FunctionDescriptor -> DescriptorKindFilter.FUNCTIONS
             else -> return emptyList()

idea/testData/refactoring/rename/classAndTypeAliasRedeclaration/after/test.kt

@@ -0,0 +1,3 @@
+actual typealias Foo = Foo
+
+class Foo

idea/testData/refactoring/rename/classAndTypeAliasRedeclaration/before/test.kt

@@ -0,0 +1,3 @@
+actual typealias /*rename*/A = Foo
+
+class Foo

idea/testData/refactoring/rename/classAndTypeAliasRedeclaration/classAndTypeAliasRedeclaration.test

@@ -0,0 +1,7 @@
+{
+  "type": "MARKED_ELEMENT",
+  "mainFile": "test.kt",
+  "newName": "Foo",
+  "withRuntime": "true",
+  "hint": "Class 'Foo' is already declared in package"
+}