Report redeclaration errors for type aliases vs class/interface/object.

compiler/testData/diagnostics/tests/redeclarations/TypeAliasVsClass.kt

@@ -0,0 +1,17 @@
+// FILE: file1.kt
+class <!REDECLARATION!>SomeClass<!>
+
+typealias <!REDECLARATION!>SomeClass<!> = Any
+typealias <!REDECLARATION!>SomeClass<!> = Any
+typealias <!REDECLARATION!>SomeClass<!> = Any
+
+class Outer {
+    class <!REDECLARATION!>Nested<!>
+
+    typealias <!REDECLARATION!>Nested<!> = Any
+    typealias <!REDECLARATION!>Nested<!> = Any
+    typealias <!REDECLARATION!>Nested<!> = Any
+}
+
+// FILE: file2.kt
+typealias <!REDECLARATION!>SomeClass<!> = Any

compiler/testData/diagnostics/tests/redeclarations/TypeAliasVsClass.txt

@@ -0,0 +1,30 @@
+package
+
+public typealias SomeClass = kotlin.Any
+public typealias SomeClass = kotlin.Any
+public typealias SomeClass = kotlin.Any
+public typealias SomeClass = kotlin.Any
+
+public final class Outer {
+    public typealias Nested = kotlin.Any
+    public typealias Nested = kotlin.Any
+    public typealias Nested = kotlin.Any
+    public constructor Outer()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public final class Nested {
+        public constructor Nested()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class SomeClass {
+    public constructor SomeClass()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}