Report WRONG_MODIFIER_CONTAINING_DECLARATION for vararg in setter

compiler/testData/diagnostics/tests/varargs/varargInSetter.kt

@@ -0,0 +1,6 @@
+class My {
+    var x: String = ""
+        set(<!WRONG_MODIFIER_CONTAINING_DECLARATION!>vararg<!> value) {
+            x = value
+        }
+}

compiler/testData/diagnostics/tests/varargs/varargInSetter.txt

@@ -0,0 +1,9 @@
+package
+
+public final class My {
+    public constructor My()
+    public final var x: kotlin.String
+    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
+}