Annotations on type aliases: typealias is not a "default target".

Add diagnostic test for annotations on type aliases.

compiler/testData/diagnostics/tests/typealias/annotationsOnTypeAliases.kt

@@ -0,0 +1,15 @@
+// WITH_RUNTIME
+import kotlin.annotation.AnnotationTarget.*
+
+annotation class NoTarget
+
+@Target(CLASS)
+annotation class IrrelevantTarget
+
+@Target(TYPEALIAS)
+annotation class TypealiasTarget
+
+<!WRONG_ANNOTATION_TARGET!>@NoTarget<!>
+<!WRONG_ANNOTATION_TARGET!>@IrrelevantTarget<!>
+@TypealiasTarget
+typealias Test = String

compiler/testData/diagnostics/tests/typealias/annotationsOnTypeAliases.txt

@@ -0,0 +1,23 @@
+package
+
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS}) public final annotation class IrrelevantTarget : kotlin.Annotation {
+    public constructor IrrelevantTarget()
+    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 annotation class NoTarget : kotlin.Annotation {
+    public constructor NoTarget()
+    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
+}
+
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.TYPEALIAS}) public final annotation class TypealiasTarget : kotlin.Annotation {
+    public constructor TypealiasTarget()
+    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
+}
+@NoTarget() @IrrelevantTarget() @TypealiasTarget() public typealias Test = kotlin.String