[K/N] Internalize TypeCastException

As a part of efforts to stabilize Native stdlib.

kotlin-native/backend.native/tests/interop/objc/tests/kt35544.kt

@@ -2,7 +2,7 @@ import kotlin.test.*
 import objcTests.*
 @Test
 fun testKT35544() {
-    val exception = assertFailsWith<TypeCastException> {
+    val exception = assertFailsWith<ClassCastException> {
         123 as NSString
     }
     assertEquals("class kotlin.Int cannot be cast to class objcTests.NSString", exception.message)
@@ -11,7 +11,7 @@ fun testKT35544() {
 val bundle35544: Any = NSBundle()
 @Test
 fun testKT35544runtime() {
-    val exception = assertFailsWith<TypeCastException> {
+    val exception = assertFailsWith<ClassCastException> {
         bundle35544 as NSString
     }
     assertEquals("class NSBundle cannot be cast to class objcTests.NSString", exception.message)

kotlin-native/runtime/src/main/kotlin/kotlin/Exceptions.kt

@@ -106,7 +106,8 @@ public actual open class ClassCastException : RuntimeException {
     actual constructor(message: String?) : super(message)
 }
 
-public open class TypeCastException : ClassCastException {
+@PublishedApi
+internal open class TypeCastException : ClassCastException {
 
     constructor() : super()